Places to find info on Malaysia viewing/readership for various media:
Media Guide 2009: Malaysia Media and Advertising Guide Book (Perception Media, price RM30)
Audit Bureau Of Circulations publishes annual audit of print media online range 1988 to 2008.
Malaysia Communication and Multimedia Commission offers ADEX paper that analyses complete ad market in Malaysia with notes on international trends.
Nielson can be useful, esp for big picture overviews, like this one of 2006, and 2007.
The NST publishes readership numbers and ad rates so does The Star publish their readership numbers - and everyone elses! And Star ad rates are online too.
Wikipedia can be a useful source, for example Astro Wikipedia, and Radio.
Or you do Advanced Google search for "rate card" or ad rate and define .MY for Malaysian domain name.
Fights and Cheats
New Zealand print media Audit Bureau Circulation warning.
People Meter: how it works and one 2004 US controversy that caused ethnic tensions and one piece about the mobile people meter controversy and what Nielson say now about how they're trying to fix it.
Online audit issues
Interactive Media Audit Trails: Approaches and Issues has a good bit about auditing issues. Also check Jakob Nielson.