Rather than spending the night writing posts, I've been wrestling with CSS and various other design issues - the result is a new menu and content tab structure for Read/WriteWeb. The design work on all the tabs was done by the amazing Mike Rundle (he also did the logo a couple of months ago). There are still a few minor things for us to update, but I decided to release in 'beta' mode tonight. You may need to do a hard refresh of the page (shift-F5) to see the changes.
The reason for the content tabs is to provide topical ways to navigate through R/WW's content - and also to help focus our writing on those topics. One inspiration for the tabs was Gigaom.com, who implemented them last year in their re-design.
Let us know what you think, bearing in mind that we haven't 100% finished it yet.