I have had a pretty overwhelming response. After receiving little to no interest from organisations advertising on the IT4Communities website my mailshot has brought at least a dozen different requests for help. The work ranges from some simple IT support (uploading a YouTube video and installing Publisher) to improving website design or rankings to teaching some ASP.NET skills.
The response has shown there is a real appetite amongst community groups for IT support that they simply can't afford to buy in. I'm thinking about whether my time might be better spent trying to develop some sort of local network that hooks in IT companies in the area and increases the number of hours available. But maybe that's a step too far.