Weird Web October
Jay Zuerndorfer started »Weird Web October«, a challenge to make a website each day of October, based on a daily theme. Every one is invited and you can do any technology, as long as it has a URI. October is already ending soon, so there is a lot of entries to check out.
WWO is using a technology called Octothorpes, which introduces hashtags and backlinks that can be used anywhere on the web across a network of domains. I have to check this out in depth.