What APIs do you wish existed?
nir: Gmail.But more than a specific API, it would be cool if websites simply provided an XML(/JSON/etc) version for every urls. Eg, http://news.ycombinator.com/item.xml?id=955077 would return the data in this page in XML format. This would be pretty simply to create (at least as read-only API), handle the situations where people resort to HTML scraping and effectively remove the need for API docs.