The Slashdot forums have an interesting discussion currently happening regarding hackable GPS units. There’s also a fair amount of chatter about beating people with keyboards and why mother-in-laws being driven off cliffs by faulty GPS devices is a good thing (if you’re looking for a laugh). But there are some good resources for those looking to modify their navigators.
Really, anything that stores all of its files on an SD card is the easiest to modify because you just have to replace the files. There isn’t any hacking or coding involved. GPS navigators such as the Navigon 2100 would be good examples. I also learned that there is quite a large Pioneer AVIC-hacking community at http://www.avic411.com and the open source Openmoko Freerunner is a popular choice for GPS hackers as well.
Have you ever modified a GPS navigator? A TomTom or Garmin? Please share!
Blackberry maker Research In Motion still hasn’t mentioned its 


Korean handheld maker Bluebird Soft has entered the US market with the Bluebird Pidion BIP-6000, targeting industrial applications such as meter reading, parcel delivery, inventory management and public safety. The powerful Windows Mobile 6.1 job runs on an 806 MHz Marvell PXA320 processor and features a variety of wireless capabilities including a 5-band GSM modem with HSDPA, 802.11b/g WLAN, Bluetooth 2.0 and GPS.
Location-based mobile social network, 

Sense Networks, a company that crunches location data in order to group anonymous mobile users into ‘tribes’, has secured $6 million in financing led by Intel,