What a great idea there are so many web2.0 services…a communal bookmarking site to list and tag them all and rate them is a good idea, you can also comment on each service (which they call Reviews) and vote for these as well.
When I saw the word “Reviews” I thought this meant you could bookmark blog posts or webpages reviewing a web2.0 service.
I suppose they could have 2 columns, one for built in reviews, and one for listing URL’s of external reviews.
Or a similar service could be based on structured blogging or microformats, an edgeio type service that could aggregate blog reviews on web2.0 services.
[ADDED 06/05/06: lists lists lists web2.o lists lists lists]