It's in beta for Windows and Linux.
Bjarne writes excellent software for OS/2 - his InJoy Dialer for OS/2 is wonderful. I don't know the status of the Windows products.
[link|http://www.fx.dk/beta/|Beta page.] Versions for OS/2, Win2K and XP, and RedHat Linux 7.2 are available.
HTH.
Cheers,
Scott.