As I am going to give in to myself and get an iPad 2 for myself, I don’t rightly know how much storage to go for (list price for the 3G, 16/32/64 GByte models will be 499/599/699 €, respectively).
I wish my Macbook Air, bought last year, had more than 128 Gbyte capacity, but of course working on a notebook computer has wholly differents storage requirements - I am definitely not going to edit video clips on an iPad. So that’s not really an useful point of reference.
So, to anyone who bought an iPad: do you wish now you had bought more storage, or do you wish you hadn’t paid for a storage size that you did not need?