Here is the lates Boeing geosynchronous satellite map, it is dated March 31, 2012. I just replaced a 2008 map and it had 279 geosynchronous satellites. The 2012 map shows 299 geosynchronous satellites.
www.boeing.com/defense-space/space/bss/launch/980031_001.pdf
www.boeing.com/defense-space/space/bss/launch/980031_001.pdf