Cisco Catalyst 6500 IOS version 15.0(1)SY is still the latest version in the 15.0SY train for Sup2T.
However, 15.0(1)SY1 is very near:
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/product_bulletin_c25-696622.html
“Cisco IOS Software Release 15.0(1)SY1 includes the following:
- Support for the Cisco Catalyst 6904 4-port 40 Gigabit Ethernet Interface Module
- Support for the Cisco Catalyst 6500 Series Network Analysis Module 3 (NAM-3)
- Support for the Cisco Catalyst 6500 Series ASA Services Module (ASA-SM)
- More than 40 new software and hardware features”
For Sup32 and Sup720 the latest IOS is 12.2(33)SXJ2, released in December 2011:
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/release/notes/overview.html