I'm glad to see Sega bring out more of their series to the Xbox and PS2. I think it was pretty obvious from the start that there were Sega fans that didn't own a Gamecube but clearly wanted some action from them.
I don't really see what everyone is complaining about, it's not like we're not getting our fare share and most of what is on offer for the Xbox and PS2, we have in some way, shape or form as well.
It is kind of annoying that they've just slightly updated certain titles and managed to pressure gamers with the Gamecube versions already to buy it a second time for a little extra. That's just exploiting people's weak spot for Sega.