If it’s a brand new computer, there’s a solid chance SL won’t have drivers to run it. All our production machines are Lion, so I’d say try it first and then if you must you can try going backwards. I’d wait a week or two. See what happens with Apple next week. Lion’s getting an update soon, so it might be good enough for ya.
Bob Zelin had to downgrade a bunch of macs recently to SL, so I think it’s possible. I think it was in this forum a few posts down.
John Davidson | President / Creative Director | Magic Feather Inc.