And as an update, Sunbelt Software has made a free repair tool for this trojan...
You can get it here: http://research.sunbelt-software.com/SSACleaner.exe

NOTE: Since the SSA-KeyLogger spyware cannot be installed on the following platforms, it is not necessary to run the SSA-KeyLogger Clean software:
Windows 95
Windows 98
Windows 98SE
Windows ME
Windows NT4