Yes, you can grab the saved games(stored in the sram chip) off a cart just as easaly as you can grab the rom. you can build something to do this(more trouble then its worth, ive done it). Or you can use one of the commercial cart "backup" units , ie super wild card, mega game hunter.
i dont know if all the "backup" units support sram dumping but both of the ones i have acually used(mega game hunter and something double fighter) did support it.