No idea what the regional percentages will be, but hopefully we'll get some intresting maps.
In association with Tim Bickerstaff of UK-Elect, I have been making such a map of the referendum results. I hope to be at the Ceredigion count on May 6th and armed with a laptop computer running said mapping software, Tweetdeck, BBC News and my mobile phone shall be doing my darnest to record the results as they come in by local counting area and will publish a map as soon as all the results have been declared