danl
Nice idea though.
Nicely designed but I don't think that they have a very large userbase.
Unfortunately, this won't tell you what they're like to work with so maybe ask for a reference. Setting a series of project deadlines / goals upfront should also help.
It can also be tricky to work on a brief over email if you've not met the client in person. I find it's always a good idea to speak to any remote clients on the telephone as that gives them the opportunity to talk you through their ideas and brief. A proper conversation can bring up questions and ideas that wouldn't necessarily come up in an email exchange.
In the past, I've found it hard to find good developers. If you're not a developer, it's difficult to tell whether someone is good just by looking at the sites they've worked on. I've come across several developers who talked a good game but couldn't deliver before now. The agency I used to work at for example, hired a few developers who weren't up to the job. At least with design work, you can judge the visual aspects.
Links to my portfolio and company sites are in my profile if you're interested in working with me.
Download it here:
http://www.microsoft.com/downloads/details.aspx?FamilyID=8e6...
I cold called around ten small recruitment agencies who I would expect to be our target audience and explained how the system would work to them. Of the ten, only one thought it was an excellent idea, whilst most of the others told me that the features we were planning to leave out of our app would be needed if the app were to be of any use.
With this advice ringing in our ears we dropped the idea and continued on to other projects. The good thing about the cold calls was that we got valuable feedback on the app without writing a single line of code. This saved us a few months of coding to get to the same conclusion.