Use GPS positioning with your TinyDuino! This TinyShield is based on the Telit JF2 GPS Module, which is uses the popular SiRFstar IV chipset. This module is configured by default to output GPS strings in the NMEA format at a 1Hz update rate (this can be changed to a 5HZ updated with a NMEA command).
This TinyShield includes an integrated GPS antenna on the board itself (no external antenna is needed), to keep the size as small as possible. This TinyShield also inclues level shifters and a local power supply to ensure proper and safe operation over the entire TinyDuino operating voltage range up to 5V.
Tutorial here: TinyShield GPS