Things are changing quite rapidly on the LinPOS front. The home page now has some real content, and we have a statement of aim document in the download area.
Keep up to date with changes on this site, and be notified when we get releases ready by joining the linpos-announce mailing list, from the Lists link on the LinPOS project page.
Currently planning is well underway and we hope to have a roadmap and API documents up soon, as well as some representative code.