(For example: samsungmobile.com.sg always gives older Kies version than samsung.com/sg/.), so I've decided to record the list of Samsung Kies that I've found here.
Latest: [Feb 2011] - 188.8.131.5214.49 (Official Download)
Older versions (Get the download mirror from the SamFirmware link below):
[01 Dec 2010] - Kies_184.108.40.20603_102 (Official Download)
[15 Oct 2010] - Kies_220.127.116.1103_100_2 (Official Download)
How to check your Kies version: