One Flash, One Shockwave, both clever...

[Welles]

Fan and Ball, a Shockwave game...
http://www.ertdfgcvb.ch/p1/fan_and_ball.html

99 Rooms... if you are into graffiti as an evolved art form, or just an extensive, if simple, online game...
http://99rooms.terracontent.de/index.html

High speed connection probably required for these, I'd guess.

 

[SCync]

I love the 99rooms site. It's got such a dirt cool urban groove. B7

 

[Welles]

Yep, me too! I thought it was an extraordinary artistic expression.

:}