I looked at my Crate & Barrel registry today and noticed that a bunch of things (at least 10) are no longer available online and/or out of stock completely. Nothing is that hard to replace; it seems like they're just coming out with their 2011 version of the same stuff.
But it does have me worried about my casual dinnerware -- what if it goes out of stock before people really start buying it for us (summertime)? I would say we could just switch it, but my brother and sis-in-law already gave us a couple of sets that we are using (don't tell the Etiquette police)! I guess I could suck it up and buy a few more myself so we have a set of 4 or 6 and then register for another 4 or 6 in another pattern. But that would make me sad...
Crate and Barrel, why must you change things so often? It's not conducive to registries! I guess this is why you're supposed to do your registry at 6 months out (did mine early at prodding from the FMIL and because it's fun)...