Hi,
We are essentially still same SRM version but we are now at the first update level.
If you take a look at these release notes for SRM v1.0 Update1 there is a section "New in this Release" which summarizes what we added in the update alongside any required maintenance fixes:
http://www.vmware.com/support/srm/srm_10_releasenotes.html
hope this helps,
Lee Dilworth
PS: please note that as well as updating SRM our storage partners also update their adapters for SRM on a fairly regular basis so always check the SRM download page to see what the latest version of your storage vendors adapter is.