Google's LinkSpam Report and Matt's note about Mahalo (mattcutts.com)

Given the interest on Mahalo's spammy techniques, I found this comment by Matt Cutts on his blog interesting.

"... If you’re not aware, Mahalo has been making major changes recently (e.g. putting a lot of noindex tags on their short pages). It’s safe to assume that if they didn’t (and don’t) take sufficient action, then my team is always ready to investigate in detail."