lion requirements

Straight form Apple's Site:

General requirements

• Mac computer with an Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor
• 2GB of memory
• OS X v10.6.6 or later (v10.6.8 recommended)
• 7GB of available space
• Some features require an Apple ID; terms apply.
• Some features require a compatible Internet service provider; fees may apply.

Read more here: http://www.apple.com/macosx/specs.html

OOOPs........ my mini is mid- 2007..... sorry about that.... does that change things...