Same here in Miami - was at a show looking for a PPS three weeks ago. Nobody had the PPS but they all wanted to sell me the Shield. Go figure!
I like my 40 pretty well and it's still growing on me. Would I wait for months? I doubt it, even knowing what I know about the Shield (which is all good btw). Pick up a pocket holster for your snubbie and roll until you can get the next thing. Just my .02. Of course, my advice is cheap since I was able to scratch that itch. Good luck.
Just keep searching. Waiting for a single place to get them is probably a very hit or miss proposition. I lucked out and someone posted one on our local forum because they didn't like it for pocket carry which is why they picked it up. I got it for $400 from them. And my wife loves it and I do too (I want one too - in .40 cal). So, to me it would be worth the wait.
EMP, how about contacting a few of the larger, nationwide sporting goods chain stores (ie, Dick's) and have them check their inventory. Many might have this store-by-store visibility. If they'll sell and ship a firearm, then you've got your in-stock Shield.
Failing that, perhaps some of the folks who've posted about available Shield pistols in their area could PM you with the name/phone of the shop that has them in stock.
I got mine when they first came out. I was a the shop when he opened his first one. He handed it to me to check out, I never have it back. It's been a great little weapon.
I had a chance to compare a Shield and a Walther PPS side by side last month. Went with the PPS.
I just passed one up at a local mom and pop gun shop for $429. I almost bought it just because they are so hard to come by, but didn't think it would be a good idea if I came home with another.
I dont know much about firearms manufacturing or who does what but I do know that Smith & Wesson does (or did at one point) outsource manufacturing of thier polymer frames.
Back when I was in school for tool and dye making I interviewd for a QC job at a small injection moldong factory in Deep River, Connecticut. Thier biggest client was S&W.
Outsourcing may or may not have some play in the backlog and low production quantity.
Note: I never took the job so I am not offering this information in violation of any sort of hush hush agreement