Someone asked a question on the osm-gb mailing list about viewing coverage of waterways - canals and navigable rivers.
We don't seem to have one, so I created one on my http://maps.webhop.net web site.
The trouble with that site is that although it is running on a nice powerful computer (my old laptop), it is behind my domestic broadband service from Virgin Media. Although this service has a nice fast download speed, the upload speed is very poor ~900 kbps compared to 9600 kbps download. This makes the web site very slow from the outside world.
I have a little virtual server provided by CloudNext - it is nowhere near as powerful as my own server, and has much less disk space, but at least it has a fast internet connection.
I loaded a british isles extract of OpenStreetMap data into the database - it took a very long time - maybe getting on for 12 hours (not sure when it finished!) - my server takes about 2 hours. Performance rendering maps was not too bad though - rendering down to zoom level 14 took about 2 hours, which is respectable.
Just need to get the database updating to keep it up to date, and re-generate changed tiles now....
You can see the difference at http://maps.webhop.net/canals (my home server) compared to http://maps2.webhop.net/canals (the virtual server)