This was discussed a lot in the 'Visa / Mastercard forum':
http://www.flyertalk.com/forum/Forum...ML/000049.html
http://www.flyertalk.com/forum/Forum...ML/000009.html
http://www.flyertalk.com/forum/Forum112/HTML/000023
http://www.flyertalk.com/forum/Forum...ML/000110.html
http://www.flyertalk.com/forum/Forum...ML/000050.html
Just be sure you read the fine print before you enroll ... limits on ticket price, 21 day advance ticketing required,
de facto blackout periods, points expire if not used quick enough, etc.
There is more info in the 'Visa/Mastercard' forum on this and similar non-airline points credit cards. Try using searching for older posts.
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He who dies with the most miles ... is dead.
[This message has been edited by ontheroad (edited 03-24-2001).]