In my current project I actually switched from blueprint to YUI, only because I waned a 100% fluid layout - which isn't available in Blueprint.
I was initially concerned by the claims that YUI litters your code with extraneous div tags; I can now say with confidence that these claims are over exaggerated.
The YUI classes can be applied to any block level element, not just divs.
So, both are good - both are easy, give them a try. My vote would be for YUI, but only just.
In my current project I actually switched from blueprint to YUI, only because I waned a 100% fluid layout - which isn't available in Blueprint.
I was initially concerned by the claims that YUI litters your code with extraneous div tags; I can now say with confidence that these claims are over exaggerated.
The YUI classes can be applied to any block level element, not just divs.
So, both are good - both are easy, give them a try. My vote would be for YUI, but only just.
Also, 960.gs is the new kid on the block.