We have a development group using Eclipse, Tomcat, and Java 1.6 (64 BIT) on Win7 64 bit systems but can get the Dynatrace Agent to load?
the answer is YES. The dynatrace agents are available for both 32 and 64bit applications. If you launch your application from within eclipse you have to specify the -agentpath in your launch command line options. Make sure you use the path to the 64bit library of your agent in the -agentpath option.
I have a video tutorial where I show how to launch an app from Eclipse - maybe thats also helpful for you: https://www.youtube.com/watch?v=unrey8wfq-M&index=14&list=PLqt2rd0eew1bmDn54E2_M2uvbhm_WxY_6