Nice 
I need to do some more stripboard/protoboard arduinos...
Great that it worked first time for you. I now have 2 boards with either the 644 or 644P (in DIP and SMD respectively) and they are great to have the extra hardware serial and the extra digital pins. I didn't make either of them though (well I put one together - duino644). The extra space is an added bonus but so far none of my projects have gone over the 328s 32k (30k useable), most of them are under 20k 
Mowcius