I just upgraded my family's three iPhones from 3GS to 4S. I have a family MobileMe account and would like to continue to use Find My iPhone. I cannot upgrade my OSX on my Macbook Pro past Snow Leopard without rendering a professional app that I use for my business unusable. Is there a way to make this work with the new phones without upgrading to Lion / enabling iCloud? That is unfortunately not an option for me until the pro software app is made Lion compatible. Thanks.
I suppose you could set up a dual-boot environment and keep Snow Leopard in a small partition to run your business software. Clone your Snow Leopard partition into a second partition (with SuperDuper or similar) and upgrade this partion to Lion. Then remove unnecessary applications from the Snow Leopard partition and resize it to save space.
This arrangement would allow you to run Lion as you primary OS with most of your applications and maintain a boot option to Snow Leopard to run your business software until its updated. See http://reviews.cnet.com/8301-13727_7-20081187-263/how-to-keep-snow-leopard-when- upgrading-to-lion/.