Actually, there's little question that Nomar will eventually move to the other side of the infield. He'll have to. His range had decreased over the past couple of years as it is, just like it does for many SS as they get older. Now add in the heel problem, and the likelihood of a move sometime in the next few seasons becomes stronger.
Ripken moved from SS to 3B when his range shortened. The great Ernie Banks went from SS to 1B and played there for several campaigns. I'm not saying Garciaparra will be making a position change now, but it wouldn't shock me if he does within a couple of years.