Your comments

Isn't Ctrl-T the de facto standard for a new tab where Ctrl-N is for a new window (Ctrl-Shift-N in ST2)?

Personally I'd prefer:
Ctrl-T (new tab which is the same as new file in ST2)
Shift-Ctrl-T (reopen last closed tab)
Ctrl-N (new window)

Are you looking for a terminal window inside ST2 or just to execute some predefined commands?
If it is between the different edit windows, then you can use CTRL+1, CTRL+2, etc.

Or do you mean something like Alt-Tab'ing between all windows?