Whether it was supported or not, there were too many people acting immature to make it viable.
Also most people dont ahve a heatware membership. As said before its very inconvienent to have to go sign up, do deals, have them rate you, and then hope for no random people spamming your account with bad reviews.
Those who don't have one can get one... they are free, ya know.
There is no maore danger of someone spamming your account with negatve feedback than there is of someone doing the same one TF.
I'm sorry if feelings were hurt because the feedback thread wasn't stickied. The option of making an oficial one was kicked around, but the moderating of something like that would be a gargantuan task.
Using Heatware is painless, and works the same as feedback on eBay. Post a link to your Heatwave stats when you post something for sale, or put a link in your sig. If you ahve feedback on eBay, post a link to that as well.
The point is that different options were looked at and weighed, and the Heatwave one was something that can work without having to have multiple babysitters watching over it.