according to my own analysis. forums' link are no longer useful since google changed its PR algorithm I had done alot of forum linking, and then I got PR, later in next update I lost my PR (when google changed algorithm) then few high PR site gave my link and my PR increased again. It seem google is not having PR updates many time and according to real-time stats changes of sites.
Forum profile pages typically have no PR, so there's no PR to pass to your site - however, PR is not everything, and forum profile links definitely help with search engine rankings, which is really what matters -- I have ranked new websites on the first page of Google using nothing but forum profile links.
may be I have no luck. forum link building is also very complex. its time wasting. I have a magazine blog for which I never did backlinking. I got natural PR1 and usually it comes in 1st page of google for many keywords its just a thread link
Dont depend on Luck, all have to work infect work hard to find good back links to improve business. as no FULL JUG OF JUICE IS AVAILABLE.
Links from forum posts still carry value with Google - some more than others. I do see this changing in time so that it will stop promoting spam, but for now, they're still important as part of your overall plan.
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