I started looking at a few commercial mesh wireless products, which typically retail at around £300-400 for a typical house. I then Googled and discovered a few Linux mesh wireless projects, such as might suit running on a Pi.
Anyone here have any experience of such things?
(The biggest obstacle with the Pi is likely to be the slow Ethernet port but there are faster single board computers around that might work better. Regardless, the Pi might be a good place to start playing.)