These have been an open secret for months now, and some of them have already even gone on sale in Europe already, but HP officially unveiled four new iPAQ Pocket PCs today. Pictured from left to right, they’re the 5150, the 2210, the 5550, and the 1940. The 2210 has a 400Mhz processor, 64MB of RAM, and is the smallest Pocket PC that has both Compact Flash and SD expansion slots. The 1940 has a 266MHz processor, 64MB of RAM, an SD expansion slot, and built-in Bluetooth. The 5550 and the 5150 both have a 400MHz processor and built-in Bluetooth. The 5150 (Van Halen’s PDA of choice?) has 64MB of RAM, while the 5550 has 128MB of RAM, built-in 802.11b, and a biometric fingerprint scanner.