Can you tell what show I'm excited for?

Update 4/30/2010: That last logo, the gate from the newest series, is home-made from this version:

Note: The working source I used was slightly higher resolution, at about 900px wide.
Not bad, eh? I had to completely redo three chevrons (those little glowy thingys) because one was obscured by the floor, and I rebuilt the other two because they were under the floor.