Listed below are some of my favourite links:

Imperial Airways and the 'Imperial 42' Project
http://www.imperial-airways.com/

Singapore Stamp Collecting
http://asia.dir.groups.yahoo.com/group/singapore_stamp_collecting/

Singapore Philatelic Museum
http://www.spm.org.sg/

Singapore Post's Website
http://www.singpost.com/

Vincent Yeo's Homepage
http://www.oocities.org/sg/vincentyeo_88/