Didn't see this elsewhere:

http://www.continental.com/onepass/n...38EE5E89BDC1D7

Join the ExtraMile by December 31, 2004, and earn 50% more miles for every paid flight from January 1, 2004 [I think they mean 2005] through December 31, 2005. That's on top of any Elite and/or promotional bonuses for which you may qualify. Plus, when you enroll in this promotion at continental.com, you'll receive an additional 1,000 bonus miles.

Just choose the option that best fits the way you travel:
Pay:* Earn up to:
$50 5,000 bonus miles
$100 10,000 bonus miles
$150 15,000 bonus miles

T&C: Fee is non-refundable once The Extra Mile payment has been processed.

Valid only for members residing in the 50 U.S. and Canada. Only one version of The Extra Mile may be purchased in a 12-month period. Mileage bonus is based on actual miles flown on flights operated by Continental Airlines and Continental Express. To qualify for this offer, all flights must be flown from January 1, 2005 through December 31, 2005. Only fares that are eligible to earn OnePass miles are valid. Mileage bonuses do not qualify toward Elite status.
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Edit: the link is somehow not getting to the right spot. The offer is under OnePass News & Offers.