Because of the troubles faced in debugging a single testMethod failure out of many in an Apex class, I posted this as an idea on SFDC Idea Exchange.
Eclipse Java/Junit plug-in has this support. For non java guys, Junit is an unit testing framework for Java and Eclipse has a great support to run single testMethods. So it could be really great to have this Java-Junit Style support in Apex too. Here is an screenshot from sample eclipse java project, that shows the scenario where we have 3 test cases and we want to debug only one out of them
Here is the link to that idea https://sites.secure.force.com/ideaexchange/ideaView?c=09a30000000D9xt&id=087300000007YDCAA2
Guys if you agree with me, please promote it !