It's def. seized. Here's my plan (in order):
1) ammonia down the seat tube (really?) ($2)
2) let LBS have it overnight while they soak it in PB Blaster. They are also getting in some tool that freezes seized metal parts to aid in separation. ($25)
3) force it out and replace ($105 + labor)

Are there any other problems caused my a seized EBB other than chain tension, because I'm not noticing anything?