The reason not to have so many links is because it comes off as unnatural to the search engines ... If a link is supposed to be a "vote" for that page, and you vote for half the Internet, there's just way too much dilution to make any of your votes count.
Plus, it's really sketchy just how the search engines respond to nofollow. I've played around and solidly found beyond a doubt that I actually do pass massive amounts of PR with DaniWeb's nofollow links (so you might want to consider adding a forum signature even though it's nofollowed!).
cscgal
The Queen of DaniWeb
19,421 posts since Feb 2002
Reputation Points: 1,474
Solved Threads: 229