Via Stephen Abram:
http://stephenslighthouse.sirsidynix.com/archives/2007/10/top_10_strategi.html
Social Software
Mashup & Composite Apps
Metadata Management
Web Platform & WOA
Real World Web
Green IT
Business Process Modeling
Unified Communications
Virtualization 2.0
Computing Fabric
Read it all here: http://www.gartner.com/it/page.jsp?id=530109