"Web Digest is a publication of the Education Resource Center (ERC) at Baylor College of Medicine. Its goal is to distill and condense medical educational technology information by informing you about local ed tech events, reviewing and highlighting web sites you may wish to use to supplement lecture and/or curriculum content and apprising you of current issues, best practices and latest trends in educational technology."
The archive of Web Digest is available but it does not seem to be very up-to-date.
One of the recent issues covers some Web 2.0 topics: wikis, blogs and podcasts. Clinical Cases and Images (ClinicalCases.org) is featured in the blog section of the article Web 2.0: Are you ready for it? ClinicalCases.org does use blog software (Blogger.com from Google) to power the web site although it is not a typical blog -- the entries are not in a reverse chronological order, etc. Clinical Cases and Images - Blog (CasesBlog) is a standard blog which I use to post updates about ClinicalCases.org and to collect interesting links and comments.