Delta Air Lines’ SkyMiles is offering a 20 percent bonus for members who purchase miles for themselves or as gifts for friends and family. For example, buy 10,000 miles and you (or your recipient) will receive an extra 2,000 miles for a total of 12,000 miles. This promotion is available through December 31, 2007.

 
SkyMiles costs $0.0275 per mile (with a minimum purchase of 1,000 miles, and a maximum of 30,000 miles per calendar year) plus a 7.5 percent Federal Excise Tax per mile. More information or complete rules and restrictions are available at www.delta.com/buymiles.