There's definitely room for such a product... which is why I formed a company with a friend and wrote one. :) Our product is currently in closed beta as we squ

There's definitely room for such a product... which is why I formed a company with a friend and wrote one. :) Our product is currently in closed beta as we squash bugs, but we hit every bullet point on your feature list, plus a few more that we've uncovered as our customers use the system. Of course, we use this for all of our bug-tracking and customer support as well, and it's amazing what having a good support system does for your workflow. So, we're competitors, but don't let that stop you. After all, competition is the crucible in which truly amazing products are formed. :)