JEEEZZUSS! I wish MY friends were that cool. PSO was like my.. Original addiction.
I seriously had no idea DC games still worked online outside of things like schthack. How well does Virtual On run? Cus dang, I might just buy me some twin sticks tonight :-P
To my knowledge these are the only games that you can play online:
PSO
Quake III
Maximum Pool (dial up only)
4x4 Evo (back online since April-May) (dial up only)
Planet Ring (Back online since March) (dial up only)
Doom home brew
I think Sturmwind and some other newer DC games have online leader boards, but I'm not sure. A few other titles are in the works to be brought back online, but I don't have the status of them currently.