I ran the Thinkpad Software Installer, but it seems only checks the local path for the available updated softwares. the default local path are:

C:\DRIVERS
C:\IBMTOOLS
I made a check for my thinkpad.

The current version is 2.52.0501
I didn't run either IBM Update Connector nor Thinkpad Software Installer successfully before. I'm not sure what the difference is between these 2 applications.
However, I found an article at ibm.com which describs a new version(3.21.0601) of Thinkpad Software Installer.
- Update your drivers and software automatically
http://www-306.ibm.com/pc/support/site.wss/SOFT-UPDATE.htm
I downloaded it and installed. The new feature of checking update on Internet is available now.
I ran it and got following update list. the new version(1.40) of APS software is included.
I got in following state after an automatical update.



