some addicting games i have found are any of the papi games and throttle copter. some must get apps would be "chomp sms" "sms popup" "shop saavy" "backgrounds" "ringdroid" "save mms" "notepad" "video player" "Flashlight" "power manager" "snap photo" are all great apps that are perfect for a new G1 user i liked them A TON and easy to use and will get you started on customizing it to where you like it and show it off to your friends now a little about each
Chomp SMS- in market search "sms" and this will give you the on screen keyboard in almost an iPhone lookin text source.
SMS Popup- gives you an on screen alert when you have a new message and will take you right to it.
Shop Saavy- to wow all your friends make sure GPS and WIFI are on to find local but scan any common item ie (bag of chips) it will tell you price and where to buy.
Backgrounds- self explanatory browse and find the ones you like.
Ringdroid-No more downloading ringtones and not getting the part of the song you like import your music and pick exactly what part of the song you wanna have.
Save MMS- allows you to save pictures and videos you receive to your sd card.
Notepad- duh...
Video Player- import your movies and watch them on the go.
Flashlight- ummm...

great for finding lost beer pong balls lol.
Power Manager- quick shutoff of running features like wifi and gps, you can also set it to disable when battery life reaches a certain level.
Snap Photo- gives you a stability control for better pictures and always allows you to change the resolution and effects.
and for the games just try a bunch lol i don't know what you like...
