Uh, I don't think that there's any plans for tile-based movement at this point, actually. Gayo also mourns to lack of it since tile-based is better for things like block-pushing puzzles.
About maped, uh... I'd suggest either using aen's wonderful
PSD2MAP (java runtime required) to make your maps in Adobe Photoshop first, or using aen's wonderful
Maped2w to create your maps in, and once you're done making your map's art and layout, importing it into Maped3 to add the obstruction, zone, and entity data.
Either of those tools reduces the sheer pain that Maped 3 is in it's current incarnation. Personally, I prefer using Maped2w since I'm pushing on 8 years of the oldschool maped experience, and I'm willing to bet you'll feel more at home in there as well :)