I've just checked out the exhibitor list on the MicroMart website. I can't find the AmigaMart stall shown on the floor plan, but I hope its not tucked right in the corner.
The companies are of the small indepenant PC vendors variety, that regularly advertise in MM. Just don't expect the Compaqs and Dells of this world to be there.
Still any Amiga presence at a mainstream show is good news. :-) I'm sure that alot of people will be surprised to find that the Amiga isnt completey dead, and a few will be interested enough to buy an A1! :-D