piatkow - 1:15 pm on Mar 8, 2011 (gmt 0)
It rather depends on who the link is from as far as I am concerned. Most I pass over but occasionaly it is a site that I would have linked anyway if I had known about it.
Requests from relevant sites within my subject area I don't mind. Off topic requests get junked. Bulk mailings hit the spam folder and stay there.