Hi; OP here.
My car was delivered 1st August 09, so built in July I guess. Obviously if I do decide to Bluefin I can call Superchips up and enquire, but does anyone know what I need to be able to tell them e.g. does my build sticker or something else enable me to know what ECU version I have on mine? Can I find out for sure what my Build Week was? Or do I need VCDS to do this; which ain't an option for me sadly? I know my engine is a CBAB, but guess that may still have different ECU versions applicable?
Basically, any helpful hints appreciated. 
What Steve is correct, they send out the unit, you plug it into the car then upload some data to superchips, they then send back the MAP u d/l it onto the handset, plug it back in, turn on turn off the car, warm the car up and see how it feels, if your not happy send the unit back for a refund, if you find any issues later contact them and they can try a different map.
The only trouble I have had is when I changed form windows XP to Windows 7 64 bit, I was adding a new map but at the time their software was not ready for 64 bit machines, put it onto a laptop. The rest is history...
Try some 0-60 before and after as I've said before I had a friend in the car before and after doing the same stuff they could really tell the difference.
http://www.superchips.co.uk/search?make=38&fueltype=2&model=465&variant=2087&year=2009. Checked 2010-2011 says it can be done