Andrew Maguire has put together a nice new website focusing on the early Christian texts. At the moment it is a nicely indexed web of links to primary texts and related information on the web, with a number of texts original to the site, and more planned in due course:
Early Church Texts
It's a promising site. One thing I'd like to see added would be an updates page, or a blog or an RSS feed or similar, so that one can track the changes being made.