We get it-you don't appreciate Apple's OS Lifecycle, but what can any of us do? I paid to upgrade my old MBP to Leopard while my new MBP came with leopard, and I'll probably wait in line for Snow Leopard unless I can snag a copy from work for "testing" reasons.
If I was in that precise position, I would file a lawsuit against them in small claims court against them for failing to meet the 'general fitness' test for merchantability. At the time of sale, they provided security updates, and they did not disclose that they were going to yank them from you in 17 months when they had another product to sell you. And 17 months is not a reasonable time for them to provide updates, which is necessary to use the product for one of its primary purposes: accessing the Internet.
Let them come and explain themselves to a few dozen people in court, and they will reconsider their policy.