I just made the first updates to the API database. Surprisingly to me, there's 54 APIs there already. That didn't take long. How well do they all adhere to a strict Web 2.0 API definition? Depends who you ask. My take is that this list includes some general web services that are not purely "Web 2.0", but for now I think it's better to err on the side of inclusion rather than exclusion. Filtering, rating, prioritizing will happen a bit later.