As for dumb apps that do nothing really LOL...
Lightsaber
Gun
Zippo lighter
As for games;
Trace, Topple, Dots free, light bike, Etch lite (its an etch-a-sketch LOL!!), archers, darts, deal or no deal, a bunch of little party games like hangman and tic-tac-touch.
And as for apps that actually have some use.. lol!!
Facebook, Google, Dictionary.com, skype, and nimbuzz (it puts all your ims in one), also, you can make webpages into 'apps' i.e. icons on your 'home' So i have an icon that takes me straight to Oscraps, and one that takes me straight to my hotmail. To do that you just go to a webpage and then click the + button that is on the bar at the bottom and then click 'add to home screen' You probably already figured that out LOL!!
I just got my touch on monday, and i already have 5 pages worth of apps, all free. I pretty much just went through and looked at all the free apps and if it looked cool I added it LOL. then if i tried it and didn't like it i just deleted it.