The main AP has been shifted to the Redwood area of town and is back up and running on channel 11. Due to lower noise the network is back in shape and running beautifully. The antenna has also bee replaced with a better one to minimise SWR.
One notable change to come from this is that the antenna is now vertically polarised so you will need to adjust your antenna to suit.
Thanks for your patience!
Bad news for users: The Marlborough Centre access point has been taken down today after discussing with their manager. The Marlborough Centre roof is being replaced shortly, and the noise issues were difficult to resolve. My apologies for not getting notice out sooner. The project is still operational and the plans are at this stage to start delveloping the network into a mesh arrangement.
A mesh network can reduce the dependency on a single access point and also helps shorten distances between links as more people get on board with the project. Please contact me if you want to discuss what is happening, or to find out more on how or where you can get access.
Thanks for your patience guys!
The problem has been traced to noise, still working on a fix. In the mean time using channel 13 is helping, please change your clients to suit if you need to.
The new access point isn’t living up to expectations at the moment, my apoligies to everyone suffering. The latency is terrible and transfer speeds often drop to slower than exptected. I’m working on this as I type and hope to have a solution soon. So far the problem seems to be the SR2 card itself. 
802.11g is up and running as of today. The Marlborough Centre AP has been retired after years of faithful service and replaced with a RouterBOARD 532. Some clients will need to update their gear to the new MAC address (00:15:6D:30:00:4A) to operate with the new access point.