Hey, I run marketing for a company called Spongecell that offers free online calendars, event pages, myspace and facebook applications, and host of other tools plus email, SMS blasts, and rich reporting on all contacts. We're developing a $5 CPA affiliate program and need to bake tracking, invoicing, payments etc into our platform. The challenge we have is that we want to pay per active user who meet certain criteria (events created, emails sent, impressions, etc) and are not sure how to make our numbers transparent in ways that affiliates will trust. Does anyone have a suggestion for a third party tracking company that could help us provide logins and data that webmasters would trust that could also help facilitate payments and invoicing? Looking to automate as much of this as possible. Our developers want to build everything in-house, but I'm convinced we need a third party tracking system to avoid any haggling over conversions and numbers. Thoughts?