ICal and CalDAV issues: Address Panel - Open Directory Lookup? & others.

Question

An overview of my setup:
I'm using Google Calendar through CalDAV (set up with Calaboration), and have no problems synchronizing events. These are dealing with attendees.
Several parts to this one, so to start:
1) It appears that, likely with any CalDAV calendar, my Address Panel becomes an "Open Directory Lookup" instead of searching my trusty Address Book contacts, which I would prefer. I also cannot type in names/email addresses and have them auto-complete, which I assume is now searching the empty Open Directory.
Is there a way I can force this to still use my Address Book? Or does anyone know a way to hook my Google contacts (in Gmail) into a directory search that will come up in the new panel?
2) When people add me as a "guest" in Google Calendar (== attendee in iCal), I see it in my calendar on iCal. I see myself in the list, with my name and email address... but I cannot RSVP. Google recommends that I add my Gmail account hooked to my Calendar to my "me" card in Address Book, which I have done, but it still does not recognize, well, Me.
I'm stumped. Is there something I'm missing? Something else I need to do in iCal?

Answer 1

Thanks for the answer.
I guess because I was deleting the 'local' calendar with some of my test accounts and not others I would sometimes get the local Address Book panel by default and sometimes the Open Directory panel.
I agree it's pretty confusing.