The development version features direct upload to OSM.
You need to enter your login and password on the 'AGPS' panel. Then you can use the 'OSMUp' button.
BT747 will generate gpx files (limiting the fields to the usefull ones for OSM) and then upload them to the server using the provided credentials.
A mail should then confirm you of a successfull upload.
I'll add the possibility to add descriptions and tags later.
For now, I would be interested in hearing your feedback and success/failure stories.
While testing, be kind to OSM though: do not upload big tracks.
Given the feedback in the poll, I've given more priority to providing the AGPS upload functionality in J2ME and now I implemented a 'not yet gui friendly' version of direct upload to Open Street Map.
The AGPS upload (and download of the data from the web) should work, but I can't test it using a real internet connection (on the phone) and a real AGPS capable device, so any feedback of success or failure is welcome). You should use the latest version 0.3.XXX).