MVP Saravana Kumar has recently refreshed the BizTalk Community Site, BizTalk 247!
BizTalk 247 consolidates BizTalk articles, blogs and websites into a single resource. The site is categorized into a number of topic areas including, installation, administration, development, maintenance and security. Currently there are over 95 site contributors and over 790 BizTalk articles have been published!
Also, take a look at BizTalk blogdoc to find articles posted from different BizTalk Blogs!