Everything about iOS 4.0 (Including Instructions & Features)

Question

Hey guys,
Just to clear some stuff up I decided to type this.
_4.0 Installation_
Step 1. Plug iPhone into computer via USB and make sure you have downloaded iTunes 9.2 by either go to iTunes and under "Help" tab hitting "Check for Updates" or go to iTunes page on Apple.com
Step 2. When iTunes opens, wait until it detects your iPhone/iPod Touch. (Sometimes hitting the home button will wake up iTunes and detect it)
Step 3. Once detected hit "Check for an Update" and the download process will begin and after it will install if told to.
_New Features_
-Multitasking > By double tapping the home button on iPhone 3GS, iPhone 4, and iPod Touch 3rd Gen only, it will bring up apps you have viewed previous and you're able to flick through and tap an app you want to view. To delete an app from multitask, simply hold down an app until they start wiggling and hit the minus button next to the app you want to remove.
-Folders > To bring up a folder, simply drag an app onto another app you wish to create a folder with and BAM! your folder is created. Within each folder you can hold down an app until they wiggle and change the name of that folder and organize as well as remove and add apps to that folder. Up to 12 apps per folder is the max.
-Mail > The new mail app (to get the unified inbox and newer look you must have two or more e-mail accounts set up) features a new all in one inbox to receive emails from all your accounts into one place.
-YouTube > Hasn't changed a whole lot other than you can now while viewing a video view in portrait or landscape (left and right landscape) by simply titling your device.
-App Store > New plus buttons next to some apps you wish to purchase. (Could someone please tell me what these mean?) You can also gift apps.
-Camera > New 5x zoom in the camera by tapping the screen once in camera mode and adjusting the slider. Video mode now has tap to focus, but no zoom yet.
-Photos > Photos can be organized in videos, pictures, or all together categories. New Places can detect photos and videos you've taken previous to installation or after and show you on a map where they were taken.
-Calendar > You can sync calendars with your e-mail as well as have a birthday calendar included from contacts or just by adding them.
-Notes > You can search notes in the app by swiping down on the note selection page and tapping the search box. These can also be synced with email accounts.
-Tethering > You can now tether through AT&T from your device to the computer's internet.
-Wallpaper > In settings, you can now set wallpaper for your lock screen and home pages as well as both for a smoother looking transaction from lock screen to home screen.
-Safari > You are now able to view suggestive sites while searching and Bing is now an available search provider. While using the keyboard, you can now tilt to landscape or portrait.
-Utilities (Clock, Calculator, Compass, Voice Memos) Clock, Voice Memos, and Compass pretty much stayed the same and same with calculator other than a new app icon.
-Location is in use > You can now know if you're using your location within an app because next to the battery it will show an arrow.
-Maps > No big changes other than when using your location or to find you, the button in the bottom left corner is an arrow now.
-iBooks > Now available for free download off the App Store for iPhone. Download books and read them instantly from your virtual bookshelf which has a search if you scroll up and a fancy engraved Apple logo. Within the book you can swipe through pages, adjust brightness, and bookmark your spot.
-GameCenter > Unavailable at this time, but should be up later this year.
-iPod (Music) remote > Simply double tap the home button to get multitasking, then swipe right to access the left side (or as far left as you can possibly go) and you will see five icons. A refresh looking sign, rewind, play/pause, fast forward, and an iPod app icon. Rewind arrows skip to the previous song or hold down to rewind through the song. Same goes for the fast forward arrow. When using an app like Pandora (will need the latest update for it) you can use those same controls but instead of showing an iPod icon next to the remote buttons, it will show a Pandora app icon.
-Potrait Lock > To access this, do the same thing as mentioned above to get to the Music Remote. There will be a refresh looking icon, click that and everything will be locked in portrait mode as well as a notification in the top right corner of your phone. To turn off, simply tap it again.
-iPod > You can now create playlists!
-Messaging > You can now search messages.
-New Spell Check > You now have a suggestive spell check.
-Bluetooth Keyboards > You can now use wireless keyboards on the phone.
Anything I missed please let me know. Thanks!

Answer 1

-App Store > New plus buttons next to some apps you wish to purchase. (Could someone please tell me what these mean?) You can also gift apps. >>>>>>>>>>>>> I suspect that means universal app for iPhone and/or iPad.