I just learned today (my second day in the pharmacy at Walgreen's, hopefully I'll get a thread started on that) that the pharmacist on staff w/me completed his pharmD after receiving his BS. Interestingly, the dude went to my undergrad, U-Dub, before they had established a pharmD program. He completed a master's in pharmacy at u-dub, then did a one-year pharmD at UOP. He said "he was the one that did that", so maybe it was an exceptional case.
Anyway, from the way he described it was a very important career move for his employment prospects.
From the standpoint, it's a good idea. That said, my general thoughts are that if you're already out in the field for ten years with a BS and are doing well, you don't need to get a pharmD. Once again, there's gonna be a shortage of pharmacists for a long time. You're pretty safe in your position.