This may not be a big deal but I find that most pages on the giffgaff website follow a clean graphical look apart from the community page. I have done a mock up of a possible solution.
Whilst it is clean and attractive, it is less functional as you don't see the recent topics or posts, and in addition, the community pages are not actually standard web pages, but are components within the lithium software, which wouldn't offer the customisation required to deliver this
It's a great mockup but darrenpainter has raised a very interesting point which has to be taken into consideration. A rebuttle is - how useful is the 'last posted' and 'latest topic'?
The community serves two groups. The people who just come looking for info or help, which this would suit, and the people who provide help who use the recent posts to track fresh help requests. So a possible option would be to specify your preference I.e basic view or advanced view maybe.