Can I restore a Snow Leopard backup onto a Lion machine? So I am a little confused and slightly worried, and I was wondering if someone could answer this.

I have a Time Machine backup saved on an external HD for my Mac mini that is running the latest version of Snow Leopard.

If I buy a new computer running Lion, will there be issues with using my Snow Leopard back-up to put my files on the new machine running Lion? Is that even possible? Or do I have to update my old computer to Lion first, and make a back-up before moving to the new computer?
It's not complicated at all. I can't point to a current Lion Apple support doc but I just moved my old snow leopard time machine backup to my new Lion install.

Simply launch Migration Assistant, select your Time Machine backup and select which settings and users to copy. It doesn't care that your backup is a Snow Leopard backup.

For more information here is an article about how to use Migration Assistant in Snow Leopard. It is virtually the same in Lion.

http://docs.info.apple.com/article.html?path=Mac/10.6/en/27921.html