Yes. I've been running rooted since the day I got it.
So far I've run the following ROMs
1)
Modaco Custom Rom - Basically stock rom with option to pull out the Samsung custom apps and replace them with ASOP ones plus speed optimization etc
2)
Cyanogen Mod 7 (daily build 115)- Fully custom ASOP rom.
3)
ICS Resurrection 8.4 - Custom hack of leaked Samsung Ice Cream Sandwich 4.0.3 ROM
I'm loving the ICS Resurrection ROM at the moment, smooth as glass and fast as well.