I've seen a few DIY projects here and there involving GSM, but his name is what really caught my eye in the first place.
You may also find these interesting:
http://www.open-electronics.org/gsm-gps-shield-for-arduino/
http://www.instructables.com/id/ArduinoPhone/
I'm sure there's room to mix and match improvements.
No, none of this is very interesting at all until there is an open, free baseband firmware.
I've seen a few DIY projects here and there involving GSM, but his name is what really caught my eye in the first place.
You may also find these interesting:
http://www.open-electronics.org/gsm-gps-shield-for-arduino/
http://www.instructables.com/id/ArduinoPhone/
I'm sure there's room to mix and match improvements.