Admitedly, this is an ambitious list, but it's also a worthwhile one. Below, I've attempted to lay the foundation for every piece of website data available to marketers, researchers and the curious. Competitive analysis experts, welcome to data paradise:

Technical Data

Ownership/Hosting Data

Statistics/Popularity Data

  • Alexa Rank - via Alexa
    (e.g. SEOmoz @ Alexa - 864th most popular site)
  • Alexa Reach - via Alexa
    (e.g. SEOmoz @ Alexa - 1395 per million users)
  • Alexa Page Views Estimate - via Alexa
    (e.g. SEOmoz @ Alexa - 2.7 per user)
  • Google Trends Data - via Google Trends
    (e.g. SEOmoz - no data; only available for highly searched-for domains)
  • Compete Snapshot - via Compete.com
    (e.g. SEOmoz - 5854 visitors in August, ranked #204,215th most popular site; no direct linking in)
  • Ranking.com Rank - via Ranking.com
    (e.g. SEOmoz - 26,741st most popular site)
  • Netcraft Ranking - via Netcraft
    (e.g. SEOmoz - 20,319th most popular site)
  • Bloglines Subscribers - via Bloglines Feed Search
    (e.g. SEOmoz - 448 subscribers)

Search Engine Indexing Data

Link Data

  • Yahoo! Link Data - via Yahoo! Site Explorer
    (e.g. SEOmoz - 187,234 external links)
  • Technorati Link Data - via Technorati
    (e.g. SEOmoz - 8,961 links from 2,541 blogs)
  • MSN Link Data - via Live.com
    (e.g. SEOmoz - 107,512 external links)
  • Google Link Data - via Google (note that this information is purposefully inaccurate)
    (e.g. SEOmoz - a uselessly erroneous 2,370 links)
  • Google PageRank - via RankAlert (shows for all 72 datacenters)
    (e.g. SEOmoz - PR 5/10 or 6/10 depending on DC)
  • Exalead Links - via Exalead
    (e.g. SEOmoz - 4,308 external links)

Social Tagging Data

Third-Party Trust Metrics

Important Directory & Site Listings

Press & Media Mentions

Wow... That took a bit longer than I expected and now it's 2am... You'd think I'd learn not to start ambitious blog posts at midnight. So, dear readers, any others to share?

p.s. I almost forgot that today is the SEOmoz blog's official 2-year anniversary. Happy B-day blog :)