This is actually a marketing suggestion, but more traffic and members makes for a fuller and richer web site. Add a tools section to your web site. Give some thought to the details about how it should be structured to prevent spam and abuse and then let vendors do the heavy lifting of completing their profile. Look at Incose for an example of an organization that followed this strategy really well.
The value of this idea, beyond serving as a resource to your members, is that a well done tools resource will quickly move up the search engine rankings. Before long, every project manager who searches for project management software (which is almost everyone at some point in time) will come across your site.
I just found your web site and think it's a great resource and would love to see it get even more traffic. I work for a tool vendor and I would certainly participate and I'm sure others would too.
Bimonthly email blast using the members list from Linkedin (I'm aware that the email blast already goes out, but I'm not sure if it is using the email list from this site or linkedin). The reason is that linkedin site has 40k members and there are only 10k register here.
Also, in the profiles, how about a section to display ones email address?
how about a contest for a gift (ipod nano)? Open the contest for a set period of time. the contest would be to tweet and/or blog about ppmng.com. 1 entry for a tweet and 1 entry for a blog. the person would need to put a link to their blog post or tweet in the comments of the contest write-up. Here is an example: http://blog.alice.com/2009/04/01/wednesday-giveaway-win-alice-swag/
A feature to flag/report (potential) spam and ability to ignore those posters in the future.
Although this is a social network, I expect project management related topics being discussed - not online money making schemes/scams.
You seem to be some kind of responsible for this site. Would you please comment on the issue Kadence Price.
Quite a few seem to be tricked by this person (or phishing programme).
If not I'm out of here ASAP.