Hi, Tony,
I think this is an excellent idea. To build upon this, I think we should have a two-tier system for primary employers and then the other kind, recruiters. Since usually it is the latter kind that is causing all the problems right now, I think we should have a clear policy on how to handle them. Right now, the policy is very straight-forward: we do not.
If we are to allow them to post job-ads (and we will probably have at least five of them a week, and most of them would be for the same job, I fear), we need cut-in-stone sort of rules, that would provide the benefit we think there is to a community while keeping the soliciting and mongering to the minimum.
I would think about registering all the recruiters who want to solicit, and then allow them to post in a dedicate board. For every recruiter, there should be a description. There should also be an evaluation system that would allow Genesys community to evaluate these recruiters. While all of these is all swell, it seems to be that unlike end-user employers, most of the recruiters would be unwilling to disclose their opportunities other than "major ISP in London area", requiring all of people who are interested to further follow up with them. So, at the end of the day, you would have Genesys community contacting them directly, without the need for the forum. Since this seems to be the way things are done right now, so the whole purpose of having recruiters advertising "opportunities" on the forum once again becomes murky. Because, people who want to contact recruiters are already doing this on their own, we would be just building recruiters' own contact base, without any clear advantage for the community in general.