Having the AV referendum on May 5th to coincide with the local and Scottish Parliament/Welsh Assembly election next year (as has now been officially declared) makes perfect sense to me.
It will save millions of pounds as elections will already be taking place in lots of areas (including my own) and hence two electoral birds can be killed with one stone. It will also increase turnout for the referendum which surely is good for democracy whatever the result?
Whenever the date was called there would have been objections from some quarters. You can always find problems if you look hard enough. The objections I have seen raised so far really do not cut the mustard and the pros outweigh the cons.
The date should remain May 5th 2011.