aww the rotastak palace things look very cool, though just a warning one of my friends who has lots of hamsters never gets anything by rotastak as they used to use them but found that the hamsters could get out so easily because of all the tubing and they could chew through them really easily! just thought i'd warn you, i was also going to get a big palace type thing for my hamster but didnt instead got a cage type thing which is as big as a bird cage with 3 levels!
as for names::
Ruby
Princess
caramel (depending on colour of hamster)
cupcake
popcorn
pumpkin
cookie
http://www.angelfire.com/id/jacheong/names.htm l
^this website might come in handy.