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Eurex US

I've just been watching the volume for the ER2 on Eurex US and comparing it to the volume of the same instrument on CME. If you're using eSignal then you can see these 2 contracts by using the following symbols:
Eurex US: ER2 U5-EUS

(The U5 is for the September 2005 contract. Use the HMUZ symbols with the appropriate year for other contracts.)

The Eurex volume is a fraction of the CME volume. This leads me to the question: How does a new exchange launch a competing contract? It's a real catch-22 situation. Nobody wants to trade it until there is sufficient volume and there won't be volume until people start trading it...