These are our recommended GPS solutions for use with a Pocket PC or Smartphone
GlobalSat BT-338 $89.99
SiRF Star III high performance and low power consumption chipset
20 channels all-in-view tracking
1700 mAh battery for 15 hours of operating time
Communication with Host platform Via Bluetooth Serial Port Profile
Built-in ceramic patch antenna
Superior sensitivity for urban canyon and foliage environment
3 LED to show the rechargeable Li-ion battery
Bluetooth operation range:10 Meter
Voltage: Rechargeable and removable battery with 5V DC input charging circuit
Operation Time: 15 hours continuous mode; 20 hours trickle power mode
Protocol messages: NMEA-0183 output protocol
Output format: GGA(1sec), GSA(5sec), GSV(5sec), RMC(1sec),VTG(1sec)
Dimension: 72.5mm x 40.4mm x 23mm
In The Box:
BT-338 BT GPS receiver w/ 1700mAh battery
Carrying Case
AC charger (US and European plug included)
12V
DC charger
Utility CD
Free Extra Bonus: Arkon PDA windshield mount (a $20 value)
GlobalSat BC-337 $86.99
Unlike traditional GPS receivers which require separate antennas or wires, the BC-337 is an integrated receiver with a built-in patch antenna designed to fit directly into the Compact Flash or PCMCIA slot. The BC-337 was designed in SiRF Star III with wireless consumer applications in mind; it will give accurate readings from up to 20 channels. The BC-337 has an exceptional accuracy of WAAS which makes it ideal for detailed turn-by-turn mapping. The BC-337 is an inexpensive, flexible alternative to traditional navigation systems. The BC-337 is truly transportable, and works with a Pocket PC or Laptop.
CFA compliant.
SiRF Star III/LP low power All-in-View high performance 20-parallel channels.
Supports Standard NMEA 0183 command: GGA, GSA, GSV, RMC, GLL, VTG.
SingleSat updates in reduced visibility.
Superior urban canyon performance.
FoliageLock for weak signal tracking.
Optional external antenna.
Built-in Antenna for high sensitivity to satellite signal.
LED indicator for GPS fix or not fix.
Hot Start: 1 sec. Average
Warm Start: 38 sec. Average
Cold Start: 48 sec. Average
Reacquisition Time: 100 ms
Position Accuracy: 10m 2D RMS, SA off; 5m WAAS enabled
Power consumption: 90mA @ 3.3V continuous mode
Antenna Type: Built-in active antenna
User Guide
Data Sheet
Package Content:
CF GPS Receiver x 1
PCMCIA Adapter x 1
External
Antenna x 1
CD (driver software for use in a laptop PC)
Free Extra Bonus: Arkon PDA windshield mount (a $20 value)

GlobalSat SD-502 $139.99
Ideal for single-slot PDAs: Map storage and GPS on a single SDIO card.
SiRF Star III high performance and low power consumption chipset.
SD-502 has a GPS omni directional antenna
LED to show GPS signal fix or searching
SDIO interface.
Built-in memory size: 512MB.
Power consumption: 90mA at 3.3V continuous mode
Antenna Type: Built-in active antenna
Compatible
with most Pocket PCs, however, it is not
compatible with the following: HP iPAQ h3970, HP iPAQ hw6515, Toshiba
E800BT, Qtek S100
Free Extra Bonus: Arkon PDA windshield mount (a $20 value)
i.Trek S3 Mouse GPS $79.99
Please choose the correct PDA cable from the drop down list
The i.Trek S3 Mouse GPS features waterproof casing with magnetic base. It incorporates the latest SiRF Star III GPS chipset and an active patch antenna for the highest degree of GPS accuracy. The PDA connection cable is available for Several Pocket PCs.
Includes a 12V vehicle power plug that powers the PDA and the GPS.
Satellite Measure Used: 20-channel parallel automatic selection
Dimension: 53mm diameter x 19.2mm height
LED Indicator :
LED OFF: Receiver switch off
LED
ON: No fix, signal searching 
LED Flashing: Position fixed
Includes Free Extra Bonus: Arkon PDA windshield mount (a $20 value)