New Q&A with lots of map-maker goodies:
http://www.battle.net/forums/thread.aspx?fn=sc2-general&t=103825&p=1&#post103825
Summary:
-New Map Locking/Protection feature
-Hero and inventory system confirmed to be built in to the editor.
-You can now mix and match terrain tilesets much easier than you could in Wc3
-Maps are currently capped at the usual 256x256 size.
-You can adjust building 'footprints' to any shape or size.
-Editor will "support text coloring, unit coloring, player "12" (i.e. neutral player) units" (I didn't understand exactly what this meant...)
http://www.battle.net/forums/thread.aspx?fn=sc2-general&t=103825&p=1&#post103825
Summary:
-New Map Locking/Protection feature
-Hero and inventory system confirmed to be built in to the editor.
-You can now mix and match terrain tilesets much easier than you could in Wc3
-Maps are currently capped at the usual 256x256 size.
-You can adjust building 'footprints' to any shape or size.
-Editor will "support text coloring, unit coloring, player "12" (i.e. neutral player) units" (I didn't understand exactly what this meant...)