Arduino Blink example does not run after upload from eclipse
This question has been open for a while and I have been scratching my head for a long time but it finally worked just minutes ago!!!

This is what finally worked for me:
http://www.arduino.cc/playground/Code/Eclipse#Arduino_core_library
In this tutorial, scroll down to "Arduino target reset for uploading" look under the Linux section for the following instructions:
"Instead of using programmer stk500v1 with AVRdude, use programmer arduino and it creates the reset automatically. In the project properties, change AVR -> AVRDude, Programmer tab, Programmer configuration. Edit the existing one or add a new one."

Although I am using win7 x64 this change worked for me when I used it with a baud rate of 115200.