cpc464: looks like starter edition only supports
Terran
and two old maps
Yes, you can only play as Terran in the Starter Edition. Regarding the maps: The Starter Edition also offers some 2v2 maps, which could be fought on in 1v1, if it is absolutely necessary. But... (see quote below)
kavazovangel: Am I the only one that wants to play on all officially published maps?
It certainly would add a bit more of randomness to every match.
At this point in time way more people have filled out the form who own the full version of StarCraft 2. So if the bracket is full of those people, of course we will use official ladder or tournament maps only! Don't worry. :)