Detailed Specs for Santa Rosa Lenovo ThinkPad T61 and R61 Listed on IBM Site
http://www.notebookreview.com/default.asp?newsID=3657

So basically the story is The T61 and R61 are coming with planned availability dates of the following:

May 2007 for initial rollout of the widescreen 14.1" versions
Models with NVIDIA graphics and Microsoft Vista 64-bit or XP Pro will be available July 2007.
Models with 160 GB (5400 rpm) FDE hard drives will be available July 2007.
Models with Blu-ray DVD burner will be available July 2007.