I know PR generally doesnt mean a lot. But im thinking of increase PR on some sites to sell backlinks on them.
http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=66356
ask matt cutts to increase your PR and pay him.that whats i do.
i got PR 2 in 5 days.seriously..just email him.
if you willing to pay $200 you are ready to go for PR3 or PR4 in less than a months.
Didn't have much luck with commenting, but profile links boosted my site to pr6 in a few months.