BB in East Palo Alto, CA has the 42PX60U on display.
BB in San Carlos, CA has the 50PX60U on display.
I was able to buy the 42" from the San Carlos store for $2250 (price match to Panasonic's website, plus Club Panasonic discount). Their computer says they'll get it in on 3/24. The East Palo Alto store wouldn't price match.
I ordered mine today directly from Panasonic for $2,499.00, plus free shipping and a 10% discount (b/c I'm buying directly from the manufacturer). The Panasonic rep told me that the March shipment of the TH-42PX60U sold out in THREE days and that my TV will ship mid-April. Best Buy is selling this TV for $2,999.99 and they didn't even have any in stock.
Panasonic's phone #: 1-800-405-0652