Comment Use these guys... they worked for us (Score 3, Informative) 165
I can give you my thoughts relative to having founded, grown, and eventually selling my company back in the 90's. I'll leave it up to you to decide how relevant all that is a little over a decade later.
My company had a software product that eventually was sold internationally, with customers in 23 different countries. We had a staff of about a dozen engineers and an office assistant. We were entirely profitable, with a solid track record and a respected product. When it came time to sell, I found the people at the Corum Group to be invaluable.
I'd suggest starting at their web site and moving forward from there. They are pricey, but the advice and guidance along the way proved to be worth it. Along the way, you'll probably hear a lot of things you don't want to hear, and will be asked to do a lot of things you don't want to do. Get over it. These guys know their stuff.