I recently came across this site while looking for some analyzers. As far as I can tell it does a decent job at checking your website for a number of useful things and even grades it.

http://www.websitegrader.com/

Brief summary of what it will report to you for FREE:

SEO
Metadata
Heading Summary
Image Summary
Interior Page Analysis
Domain Info
Google PageRank
Google Indexed Pages
Last Google Crawl Date
Traffic Rank
Inbound Links
Blog Analysis
Blog Ranking
del.icio.us bookmarks
Digg.com Submission Summary
RSS Feed
Conversion Form
Keyword Grader
Score Summary

Check it out sometime if you get a chance it's interesting.