I just redid my site using blueprint, and it's great. The layout is more robust (I'm not a css wizard), and overall browser consistency has improved. It was also very easy to use.

i am converting 2 sites to blueprint too. it's simple and damn efficient. also created a script to generate the CSS with color schemes.

I really think there's no tool like a text editor and firebug for css editing.

Ditto to that, I'm a fan of Notepad++ and Firebug myself. I find I reuse very little CSS when designing sites nowadays anyways. (blue jays, bays, lays, days)

For those that don't know Firebug: http://www.getfirebug.com/

Note that the old bjorkoy.com site seems dead... making me think the project might be dead, but...

It seems alive at: http://www.blueprintcss.org/ with v. 0.8 as of March 2, 2009

anyone care to compare this to something like the yahoo css framework? what are the best CSS frameworks out there?

I use the Yahoo CSS framework. I can't compare directly, but if you are just looking for grid, reset, and standard font functionality, I don't see why you would look beyond Yahoo. They host the files, they have done intense optimization and testing, and they have good browser support.

I've used both, and Blueprint is way ahead in terms of design sense. It also doesn't require obscene amounts of nesting. The constant attention to the baseline is a huge win (the Blueprint links to relevant authors about using it in design).