Personally I check EC and the blog page (front page, w/e you want to call it) of CAF frequently (however rarely ever go into the forum section anymore - and actually have very little interest in the providers who advertise exclusivly in the caf forums, mind you I dont live in AB, but do travel to there or through there, on the way to Vancouver, roughly once a month). Cerb I pay no attention to, I dont like the ass kissing nature of that board nor the none permittance of negative reviews (actually that's not entirely true, about twice a month I'll look at cerb as it has a specific Brandon mb section)
Frankly I wish everyone that toured used EC as advertising (mostly because I'm lazy and only want to check one webpage, and not have to look through multiple ad sites and personal calenders to see where/when ladies are available).
I know that's my personal way of doing things and plenty others dont do that (and hey if someone else knows a good board/site to see who's available I'd like to know) just chiming in on who's looking and where.
And yea, last I remembered the sections such as Winnipeg, Sask, boards on perb are private unless you're signed in (it's been awhile since I've been signed out though)