I"ve investigated quite a few sites and am curious; anybody know if any of the top sites out there allow links that aren't nofollow? i.e: Facebook, Myspace etc... Just thinking of ways to get High PR links for free. Are there any?
Why don't you try emailing some of those top 500 sites and see if they will place a link back to your site. Surely that's a better alternative to spamming these sites. NoFollow's are being implemented for a reason...to prevent SPAM. If there was a site out there that allowed you to post links and someone mentions it on this forum, how long do you think it will be before those links become nofollow as well?
What does that have to do with getting a link on those sites? He didn't ask if it will increase his PR...he wanted to know if there was a way of getting his links onto those sites. If the site is a valuable resource and you think it can benefit them, go ahead and email them.
Not all bots follow the nofollow atribute Googlebot may but slurp and msnbot or livebot don't always.