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so..how can I keep my apps and such w/o putting iOS 4.0 on my 3G before getting iPhone 4? or is it even possible w/o switching to iOS4.0

You can restore a backup from 3G to iPhone 4. It doesn't matter if you have IOS4 or not.
 
I'll be restoring from backup. Ideally, I don't want to lose all of my stuff. But if anything goes wonky with that, then I'm OK with starting fresh.
 
i have a first gen phone. i really want to keep the contacts/calendar i have. guess i'm going to cross my fingers and backup those. After a few days of getting used to the new features I'll add the apps/pics/music.
 
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