Read on Joystiq (or Xbox 360 Fanboy, I don't know how it is called anymore) that Sega may be releasing some more vintage titles on XBLA. Right now the rumored titles are:
I couldn't care less about the majority of those titles, but just the idea of playind Gunstar Heroes with some kind of online co-op makes me almost wet myself.
Go over to Segaonline.nl to check some pictures of Gunstar Heroes and Sonic 3, but remember that this is only a rumor at this point.

Comments
DrGreenThumb NZ
9804
WHoop di do why doesnt RARE get there shit together and release perfect dark if big N has screwed us for Golden eye
that would make me cream
sumhydroponic
53370
Well considering I just got 49 vintage Sega classics for $30 bucks (Sonic Ultimate Genesis Collection) I doubt I will pick up any of those title for XBLA.
Dirty Whirlwind
29664
That's a cool collection alright, but its missing Gunstar Heroes. As for the other titles (that also features on Genesis/Mega Drive collection disc) I get rather annoyed that they would get permission to bring them over, while they (Microsoft) turn down Cave shooters.
strategykinq92
10000
well I hope sega updates the visuals like capcom has done with bionic commando.
XBLA isn't the virtual console for wii :P