[loceng]

I guess it depends really on what they're doing. If they or you are leaning towards on equity being given I would write up a very specific contract that states all of what will be done, and under what circumstances they are awarded equity - how much, etc.. and also probably setup a sliding scale of amount depending on how much they get you. You'll have to decide how much you need and what dictates what amount of equity. It won't only really be a referral - you'll have to provide other information to potential seed investors - so I'd just say put a profile up on AngelList (angel.co) and keep whatever equity - your friend can point people he/she knows to your AngelList profile then.