My maps are 7-yrs old on my 276C. I like this unit a lot - don't want a new one. This unit is great for simply knowing where I am at all times and the ease with which to plot a course it provides. But it sure would be nice to have the latest map software loaded up into Mapsource. I've poked around looking here and there - there isn't map updates available from what I can find - looks like not much support available anymore for this puppy. Pointing me to a pertinent thread or suggestions for updating it would be greatly appreciated. Maybe someone has some software they'll sell, rent or giveaway? Anyone have any luck with expanding the capability of the proprietary 512mb card as well?