[adammichaelc]

Two quick thoughts:

1. The best way to have leverage during negotiations is to have another option. So another potential acquirer, or whatever.

2. I would talk to somebody who has been through an exit. There's this list http://spreadsheets.google.com/ccc?key=tgPKuNIdWWOPUpj2ZnF8N... (was created on HN a while ago). It's a list of entrepreneurs and others who are willing to mentor HN startups. Find one who's been through an exit, and see if they're willing to help.

Good luck!