After the addition of the ISPN binary store, the overall build time (clean install) on my machine (Windows 7 x64, JDK 1.6.0_29) went up by about 2_30 minutes. Looking at the test logs both on my machine an on an OS-X machine, there are two problems:

1) an error reported in the following gist(which doesn't cause a test failure however): https://gist.github.com/f6f6b6ed1e760af974a5
2) the default configuration of JGroups is not optimal (and takes too long a time) for a local test suite, judging both from the previous link and the following: https://gist.github.com/3403853