Page rank is the honorable status for any sites. It is updated by Google for every web pages. Here is the list of PR10 sites: "adobe.com - PR10 google.com - PR10 w3.org - PR10 nsf.gov - PR10" Full list are here - Page Rank and PR10 Sites
You can but it does not carry the weight of the homepage. To the contrary, it's a rather weak link from all the bleed and you're much better off hunting down links that are relevant to your content.
will it really help...i mean joining Adobe forum and posting thr...?? r the signature there do-follow?
It's time to start looking beyond forum posting. I mean, if you really have no interest/knowledge in the forums at Adobe, why waste your time?
Page rank 10 is a topmost standard according to the Google Parameters. if your site page rank is 10 it means your site contain all the valuable information.