Also, if you are PR2 or better, you can get a link from PSC (reciprocal required) absolutely free. Just hit up
LinkEx for details.
PSC's PR will go up next cycle. I just suspended all the people linking to us with crap sites with PR0 and many crap PR1s were shown to the door as well.
PSC's Current Link Exchange Stats:
PR 3: 5
PR 2: 16
PR 1: 4
Not counting hard coded exchanges.