I'm interested to hear the difference between, say, the Moscow, Middle Russia (for lack of better term), and Siberian accents.

Does anybody know of any linguistic sites that have recordings showing the differences?

I know my buddy's from Xabarovsk and he says it's quite different ... not only phonologically but also morphologically in some instances ... his grandma conjugates some verbs without morphing the consonants ... like not turning "g" into "zh" and so forth.

Can anybody sum up the differences? Is Russian fairly uniform?