Nymex on Globex

Anybody trading the full contracts on Globex? How has it been? I see crude Nov is doing about 54% of the floor volume, on globex. Nat gas Oct is doing 42% of the floor volume on globex. How long has the floor got?

http://www.nymex.com/media/092006.pdf

 

nymex on globex is great. the calendar spreads are tightly quoted months out.

 

I entered a buy Nov 06 sell Dec 06 combo in IB TWS. Is this a globex market or a synthetic market created by IB? What are the spreads wih the most volume in natural gas?