For me. I done many things on my n900 and still couldn't get tired playing with this great device. Why don't you try installing android. All the application you were looking for are there. (well almost) Tons of games all over the internet that can be played with your n900 via nitdroid.

Or you can play with preenv. A webos game emulator which works very smooth.

I for one. Will never going to get tired with my n900. Especially now i have a free internet running via openvpn. You all know how amazing the web browser on the n900 is.