I havent been this excited for a game release since Fallout 3

I have one question. I was a little dissapointed when I played fallout 3 and found out that all the towns besides Megaton were rather small. Nicely designed but...small.
I am looking foward to Skyrim and have my fingers crossed regarding the town sizes. I would love to have huge cities where we could get lost in.
Does anyone know what sizes I should expect for towns/cities comparing to say... Megaton or Imperial city?
Thank you.