Not sure if nation wide, but at this price, it's cheaper than recharging! There's about 10 left at this particular store.
EDIT: Confirmed to be nation wide!
Specifications
Dimensions: 92.8 x 60 x 14 mm, 74 g
WCDMA 900/2100 Mhz
GSM/GPRS/EDGE 850/900/1800/1900 Mhz
High speed HSPA+ 21.6 Mbps download, 5.76 Mbps upload
Battery: 1500 mAh
Maximum working time: 5-6 hrs, depending on the network
Wifi 802.11 b/g/n, supports up to 5 devices