I've been waiting patiently to be able to use my Prime shipping, and Amazon finally got one of the K-01's w/40mm XS (black) back in stock last night for the $449 price. I ordered it, and as of this morning they are sold out again (you can get it for $559 from another seller through Amazon).
However, they still have 4 of the body only at $349 in stock as of this writing:
Amazon.com: Pentax K-01 16MP APS-C CMOS Compact System Camera [Body] (Black): Camera & Photo
I was kind of hoping for yellow, but they haven't restocked it as yet, and the husband ix-nayed that, saying he did not admire the yellow color (despite being a Bumblebee fan in
Transformers. I cannot understand it!) So, basic black it is.
This forum is what finally convinced me to give the K-01 a try. I can see it has quite a following, and I look forward to many discussions and photos long after Pentax has stopped selling "the brick".
ETA: Holy moly, it looks like Amazon does have the yellow (w/40mm lens) back in stock, and is selling it for a whopping $899! This is not a third party seller through Amazon, as I thought, but is from Amazon itself. Misprint? Or will the yellow truly become a collector's item?