[beat]

Co-found with a division of ownership on a vesting schedule. That way, if either of you bails, the other isn't stuck with a non-productive co-founder making money off your work.

And make sure both sides are bringing plenty to the table. The business/tech co-founding team is a great model (beats the heck out of most tech-led startups), but it should be fair.

Look at it this way... if you're willing to work on these terms with this business founder, could you work on the same terms with a different partner for better financial terms or chance of success?