I'm not even going to list the links, but the Great Gun Rush of 2008 is holding steady. If there are AR-15 lower receivers out there, I can't find them. Last week in Colorado, according to the FFL dealer who handles all my transfers, there were waits as long as 16 hours for approval. Yesterday, my approval took 3 hours.
The best line is from Curtis Lowe: "It's like when your dog senses an earthquake is coming..."
My advice? KEEP BUYING! An earthquake is coming. Don't forget standard capacity magazines, either. If you look around there are mil-surp AR magazines available. Brownell's, my personal choice, is still showing out of stock on everything, and Magpul P-Mags are as rare as hen's teeth. Check AIM Surplus...they're swamped, but product is coming in. They have some 5.56 ammo still in stock...check out the Prvi Partizan. J&G is still showing Colt A2s in stock (at a soon-to-be-not-overpriced $1600) but S&W M&Ps, an AR I recommend, is backordered. On mags, your best bet looks like the used Colts at $19.95. CDNN's online catalog is showing a good selection of AR mags, including the steel English Imperial Defense mags ($14.95) that I have seen spoken of very highly, although I don't have any myself.