XSI Mod Tool

I quote from Softimage web site

"
XSI Mod Tool (FREE)
... FREE 3D modeling and animation package that plugs right into Microsoft XNA Game Studio Express ..."

What does it mean exactly ?
Does XNA support his own file format or what ?

I'm not sure, but you can't use the mod tool for commercial work (just in case you're planning on going XNA for a sellable game).

Yeah.. thats a real bummer!

I'm using XSI at work here. It exports to direct x. Does it quite easily too. Works good in blitz. Don't know about XNA though.

xna does .fbx and .obj if i remember right.