The Inventor LT program (a limited version of Autodesk Inventor) come to its end as a free technology preview software. See the Autodesk Labs blog post.
The “graduated” commercial version of Inventor LT 2010 will be available only to customers in USA+Canada (plus Australia). There will be two options: AutoCAD Inventor LT Suite 2010 (notice the name; bundled with AutoCAD LT) and Autodesk Inventor LT 2010 (standalone). There should be special purchase options for those who have participated in the Technology Preview phase. Unfortunately only for those in North America and the Aussies.