What I'm reading online is that Megan, the owner of knittingpatterncentral and crochetpatterncentral, got tired of the sites and sold them. They were sold with the understanding was that they would be updated. This is not being done and the site is used for commercial purposes. Megan is creating two new sites. She plans on getting these up and running by January of 2013, so check back.
http://www.knittingatplay.com/
http://www.crochetatplay.com/