hey
I just wanted to mention that I once also made a 2d tile map editor somewhat like yours, and I never made much use of it. I find it much easier to make tile based maps by just using ya pixel prog of choice and having a grid showing the boundaries of each tile. The problem I found with such map editors is that you must draw your tiles and then split them and import them into your map editor and this is really slow and I think it makes it hard to pixel nice tiles :\.
Anyhows recently I made a prog that converts a pixel image of a map into my own map format, it just identifies all the unique tiles and builds a map. I just thought I'd mention this incase you invest more time into your map editor and find it's not so useful after all :\.
Hmm, I saw a pixel tutorial by Helm using promotion which I think somehow combined the ability to pixel freely and produce tiles at the same time. I thought this was pretty neat, and was thinking that it might be cool to beable to select an area of tiles and launch whatever pixel prog of choice to freely edit the pixels and when done have it convert them back into tiles and into the map.
But yea, for starters I think it's best to make ya maps directly in ya pixel prog of choice, and I guess once you got most of a map and tiles done you could then convert to a map and continue on in ya mapper prog.
Hmm, I don't have to much to say about ya pixels yet. But yea, I will just wait to see the composition of your map with other parts of the map, and the background, sprites and characters and such.
cya