I've always suspected that Reepicheep of 'Dawntreader' fame was actually a Hamster rather then a mouse; but have no way to confirm this.

hmmm- Corridus could probably do an entire historical series - Ghengis Hamster would be a natural; likewise I am sure both the Russian Imperial court and the bolshivik party had their Hamster Heroes. And surely Hamsters were instrumental in the building of the Great Wall of China? (the terratorial urge thing)

Even pre-history! Perhaps set at the end of the last major Ice Age when the Giant Hamsters of the glacial Tundra were being supplanted by the more modern, sleeker, faster, more intelligent hamsters we know today.

or (dare I say it?) Hamsters in Space!!!! To Boldly go where no rodent has been before!