It appears this is a move that is going to come to pass. They've mentioned several times over the last year they have been working with Inktomi behind the scenes. Many people expected Lycos to switch to Ink results early last fall, but they didn't. Do five and call me in the morning. Next to Google, NL is probably the current most aggressive spider.
Stuff is added very quick and remains fresh.
Five a day is no problem here, but don't expect it to set your server on fire with referrals.