Best file sizes for images and how they get loaded?

I have 103 images in an album in iPhoto that I'm sharing with my new Appletv. Whenever I check Preview for the Screen Saver it always seems to show me the same 6 images. When I go to view the photos directly under Computers it shows a few of them instantly (these do not display under Screen Saver) though the others take a while to load.
1. How much internal storage does the ATV have?
2. Is there an ideal file size each of these should be? Will images load quicker if I can get them smaller?
3. Why does the Screen Saver not show all of the images that also load instantly under Computer (I'm guessing they're cached)?
Thanks.

I havent heard of the appleTV deselecting items it deems to be too poor resolution.
Once it has a full cache (and it could support about 20000 large photos) you can expect that all images that show in iphoto also show in appletv.
Do they have some flagged designation? hidden?
Are they variant in file types? jpeg png?

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I'm writing a proposal using InDesign. It will be output to PDF for circulation among the team members; I imagine they will view it on a variety of screens and some will print it out on various desktop printers.
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I've just viewed the proposal in ID Overprint Preview / High Quality Display. The images don't look great. Lots of ragged lines.
I usually save everything to JPEG with a quality of 80-90...but that is just a habit, I have no reason or justification for this practice.
I'm wondering if I should go back into the original ID, PS and AI files and resave them as something else before and then place them again.
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I'm using CS4 on a MAC. My computer is a little bit underpowered for the project at hand, but I'm willing to put up with a bit of slow performance and lag if it results in a better end product.

Jagged lines is a hallmark of low resolution, not file type, or a lower quality screen preview than you think you are using. Check the Display performace settings again to be sure they really are correct, and if they're set to allow object level settings, you'll need to verify that each object is also set correctly.
Beond that, saving as .jpeg is always destructive. For the web, that's fine, but for print you should never use anything, in my opinion, but the highest quality settings for saving jpegs, and I advise again using jpeg at all. If you image is all raster data (pixels) save as .psd or .tif. If it has live type or other vector content, save as Photoshop PDF. In Illustrator save as .ai or PDF with Illustrator editing capability. If you change the extension of the Photoshop PDFs to PDP they will open in Photoshop instead of Acrobat when you use Edit Original.
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> Im having a brain freeze here! I have to make an
animation (including
> video)
> which will be displayed in 1/4 of a widescreen TV (1280
x 768) and are not
> sure
> if it is best to make the size 1280 x768 or smaller at
the same aspect
> ratio -
> because of distortion on 42-50inch TV ?
What distortion?
How are they going to display it on only 1/4 of the screen?
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Best file sizes for images and how they get loaded?

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