CainIV - 11:22 pm on Aug 24, 2010 (gmt 0)
There appear to be indications that Google realise that they've shot themselves in the foot with nofollow, because they definitely are at least crawling nofollow links from certain sites (Twitter for one).
They always did crawl those links, the nofollow attribute only removes the destination link from the Google link graph when calculating value.
I would suggest you link out to websites that are authorities and great in your space / related space, and not be concerned about nofollow'ing those links.
Some websites nofollow links that are resources, but often because they literally have 50 000+ resource links across the website.