I would like to know the name of the set top box companies and vendors that provide support for XBMC
No companies provide support for XBMC at all.
There are some companies that use XBMC, or an XBMC derivative inside their set top boxes, but this is obviously not the same thing as providing support.
Cheers,
Jonathan
Oh, that's a good point, jmarshall. I was assume the question was regarding financial support.