I'm an entrepreneur that has, through bootstrapping and a friends/family round, built a product and is currently in-market, with customers (not many...but they are real and using the site). The customers are loyal and believe in the product. The webapp was built using offshore developers that are really good. I want to bring in a technical co-founder that could take many of the product management/design/development activities off my plate, allowing me to go out and market/sell more.
How much equity should they get, assuming they aren't going to receive any base salary, at least at the start?