There is a discussion on the AA board on OW RTW fares from Asia and how the currency fluctuations are impacting the optimal places to start/end your trip.
http://www.flyertalk.com/forum/Forum71/HTML/003726.html

For a 3 continent trip in First, starting from Singapore it is about US$5,300 and from India it is US$4,800. In Biz for 3 continents it is about US$3,900 from Singapore and US$3,100 from India. The rates as of 5/25/2001 are posted to the above thread as well.