I'd stick with what your current therapist is doing with you. Obviously, that PT has been able to examine you and knows much more about you than I could learn from a message-board thread. My experience is that you can get good symptoms control and get people back to running within a month and can build from there slowly over another month. It really takes a lot of work on your part. As much as possible, I try to get the runners I treat to cross train ASAP, and the most common way that I do so is to use incline-treadmill walking (15% incline, starting at ~3mph) which usually (depending on their conditioning) allows them to train at a level that will get their heart rate in the 140's- 150's. If they can get through a week of that, they can usually start a walk-run program (such at 2 min run, 4 min walk) along with the treadmill incline work and build up the run-walk to 30 minute periods (and once they achieve that, I have them transition to more running/less walking). The general rule of thumb with stability training in the advanced phases is to work through a combination of closed and open chain training, making sure that the runner maintains proper pelvic alignment - typical exercises include hip hiking on a step, step ups on a tall (12" or greater) step, single leg balance with leg-swinging and weighted squats or kettlebell swings.
The belt that you're using (Serola) is fine, they make a good product.
As far as the other thread regarding PT: I take all of that with a grain of salt. The kid writing it (the PT out with 4 years of practice experience) sounds a bit young to be making such grand pronouncements. Any career that you pursue is what you make it. All professions have their disgruntled members and also have their slackers and PT isn't immune. I find it to be quite challenging, have to work very hard to balance the time in the clinic with the time out of the clinic keeping up with the professional journals to stay as current as possible (particularly with treating runners, because there's a great deal going on in the literature now). My thinking is that most PT's aren't really that great until they get 10 years of experience; it takes that long to see enough patients and to absorb what you've learned to start applying it all. If his experience has been clinics that focus on loading their patients down with multiple modalities and such, then I find that sad as well, but each person (therapist) is responsible for what they do, and if he's been stuck working in such a situation, there's plenty of opportunities to work elsewhere. I guess what I'm getting at is that things aren't as dark (by a long stretch) as he makes out. If anything, what I've found is that PT has probably made too much of the weaknesses of their profession. Talk to other professionals in health care (medicine, podiatry, etc.) and you'll find that they deal with the same issues - PT has been more transparent about it than others (not just my opinion but what I've heard from physicians in regards to the line of evidence-based practice research that PT is carrying out). Want a dose of it? Go over to the message boards over at Podiatry-Arena and see how those guys stress over their profession, because they deal with the same things (and podiatry is on much slippier ground that PT is).
No, I'm not in the Orlando area; I used to practice in Sarasota, but moved to Greenville, SC a few years ago, in part because it's a great area to to work with distance runners, cyclist and triathletes(so I know what I'm talking about when it comes to changing jobs if one isn't happy with where they're at). The only reason that I have time to pontificate like this today is that I'm home because of the snow storm (the south really is clueless about snow removal). After I finish this, I've about 2 hours worth of Dartfish video from a running eval to process and a report/exercise program to write up for that runner who, surprisingly enough, has a problem very similar to yours.
Life is what you make of it!