Well, with a good 40 linguists signed up in the first day of testing, it's not untrue to say that initial feedback has been generally positive*. It is quite a simple system, really, so there's not a lot to go wrong. The feedback received was very valuable.
Already added is the ability to edit your own prices, contribute to forum discussions and a new mechanism for vetting users.
Other considerations are other ways to cost translations (per line, per character, etc.) and a potential linguist/agency review system - although this may be fraught with difficulty and may prove inefficient and libellous.
So a big thanks to all those who have taken part so far - we're well on the way to a working service.
*Do please send negative feedback if you have any, it's all welcome...