Park Place - A recreation of the Amazon S3 API, but hosted on your own machine. In Ruby. Perhaps not entirely uninteresting after the recent 7-hour outage - for example, you could run a mirror of the data at Amazon on your own box and, in the event of longer outages, switch to your own copy within your own software to at least remain rudimentarily functional during S3 outages. Or even build your own server structure based on this and turn your back on S3.
Archive 21. July 2008
Wikipedia Webservice - Convert Geo-Coordinates to Wikipedia Articles. Hmm, that would be a nice DIY project, search for Wikipedia at the local point on the iPhone and display it. I've already done some DIY projects on the iPhone.