It's stated:

...Avoid infinite crawls. For instance, if your site has an infinite
calendar, add a nofollow attribute to links to dynamically-created
future calendar pages...

Which has link to the page...
http://www.google.com/support/webmasters/bin/answer.py?answer=33582

Which states:

....Meta tags can exclude all outgoing links on a page, but you can
also instruct Googlebot not to crawl individual links by adding
rel="nofollow" to a hyperlink. When Google sees the attribute
rel="nofollow" on hyperlinks, those links won't get any credit when we
rank websites in our search results....

"instruct Googlebot not to crawl" and "those links won't get any
credit when we rank websites" are two different terms.

Does Google crawl a rel="NOFOLLOW" tagged link and not give it credit,
or does it just stop at the link and not visit that page unless it's
found elsewhere?  Having infinite looping pages like a calender not
linked to from your own site with NOFOLLOW may stop Googlebot from
crawling internally, but if someone were to link to that page from the
outside Googlebot would get caught in the trap again.  Shouldn't the
META nofollow tag then be used to keep any/all good behaving bots off
of a page you don't want crawled?