I just tested the Technology blog using the Web 2.0 Validator from 30 Second Rule, and it scores only 4 out 16, as follows:
Uses python? No Is in public beta? No Is Shadows-aware ? No Has favicon ? Yes! Uses Google Maps API? No Uses Cascading Style Sheets? Yes! Mentions startup ? No Appears to be web 3.0 ? Yes! Appears to use AJAX ? No Refers to Flickr ? Yes! Mentions Cool Words ? No Mentions Nitro ? No Refers to web2.0validator ? No Uses microformats ? No Validates as XHTML 1.1 ? No Mentions 30 Second Rule and Web 2.0 ? No
However, just by writing this post, I've managed to get the score up to 7 out of 16, which is already half way to being a top Web 2.0 site!
By the way, if you can think of some good Web 2.0 tests, you can add them. See this blog entry for more info.