[mkgmap-dev] OSM maps on the new eTrex 30

Hi, Does anybody already has any experience with a mkgmap generated map on the brand new Garmin eTrex 20 or 30? I know these models are available for just a couple of days now, but I'm seriously considering buying a eTrex 30 any time soon. But I only buy it when the OSM based maps work on them. Maybe I can take a gmapsupp.img with me to the shop and try myself before I buy it, but if anyone already has any experience I would really like to know. Regards, Frank