Today Google announced in their Mobile blog an application for Android phones to record, display and share GPS tracks.
Today Dylan Casey, a former professional cyclist, announced another location-based service from Google. My Tracks is a new Android application that makes it easy to record your routes when cycling, running, hiking, or doing pretty much any outdoor activity.
Record your training routes with the My Tracks Android App - Google Mobile blog - February 12, 2009
The application site
includes a video explaining the application, sample maps, and other information. The FAQ says you can get tracks out in GPX or KML format (in an email attachment, which seems a bit inconvenient, or saved to the phone's memory card).
This is another step in the mainstreaming of GPS track logging.
You can get a T-Mobile G1 through Amazon.com (as is usual, the price is based on you getting a T-Mobile service plan).