Well, this is my experience.
I work under several NDAs. So we can not submit things to Soft for their gallery. Even once we are finished with the work, we still can not submit stuff with out going through the chain o command to get approval. Which can be a real pain.
Sucks, I know. But the thats the nature of the biz. So I am guessing that most professionals can't submit stuff to Soft.
Thats doesnt mean that we/they can't submit our own personal work. But I know that I just dont have time for that. All of my time is spent at work doing the job.
The other issue, Lightwave and MAX are also more widely used. So to some degree it makes sense that there would be a wider sampling of images for galleries.
So to sum up, my guess would be that most pros cant submit because of NDAs and with some time and more people using XSI, you will start to see a lot more stuff coming.
You should look at the NAB and GDC Softimage demo reels on the Soft site. Plenty of XSI goodness.
http://www.softimage.com/Products/Xsi/v2/Reels/
Give it time, I think that there will be lots of good stuff coming.
Check out this gallery from Softimage
http://www.softimage.com/Community/Xsi/Gal...ay/Gal\_may1.htm
Later,
Vmpre