I got 3 of these SMSes, right after each other 04/14/2009 03:28:06, all from the same number(+256718081559):

Japan Motors Show: Your phone No. have won a Toyota Land Cruiser worth $75000 in our promotion held here in Nairobi Kenya. Call +254729676818 for more details.

Of course I wouldn't bother answering, I would rate it 99% if not 100% a scam.
Thank you for your site where one can share information about it.