Will online PR with optimized anchor-text hurt my SEO efforts?

[jamesq]

With Google's recent phishing expedition and increased focus on natural link profiles etc where does this leave PR distribution with optimized anchor-text?

Using the pai for PR distribution services has always been a great way to build backlinks but I just wonder whether these will be considered over-optimised in future?

[Nightwing]

Hope not been using PR WEB (Paid for servioce) my self and not seen any measurable "damage"...