Currently Being ModeratedAug 10, 2011 4:22 AM (in response to cstorres93)
You can purchase Snow Leopard Mac OS X 10.6 Snow Leopard - Apple Store
Make sure your Mac meets Lion's requirements > OS X Lion - Technical specifications
Once you have Snow Leopard installed you can download and install Lion from the Mac App Store.
Informative article to read BEFORE upgrading to Lion > Lion upgrade questions and answers: Apple Support Communities