How to sell?
hga: I too am an introvert who's physically exhausted by talking to strangers (but not friends).  Here's what I did when my programming and system integration work was behind ~ $3.75 million of $5M total for FY92 of the company I was working for:Frequently the senior salesman, our "closer" (and he was good), would take me to a customer to convince them we had what it took, understood their problem and would solve it, integrate with their systems, etc. etc. etc.  (For verisimilitude I'd be wearing my normal business casual attire of a dress shirt, black jeans and visually quiet running shoes.)I'd spend up to a few hours before a whiteboard with their people and honestly sell our proposed solution, and it worked very well.  I wasn't good for anything the next day, but that was more than an acceptable cost.Anyway, my point here is to echo russell, you may be able to do this with a division of labor approach.  Get some salesmen who are good at sales and good enough with the domain to do the work you find the most hard, and reserve your sales efforts for where you can make the most difference.Good luck!