I'm pretty sure that you don't mean CPANTS since that's essentially OS-independent. It sounds like you are actually talking about CPAN Testers which is the smoke-testing service. It's not unusual to see these two similarly-named systems mixed up.
Anyway, it sounds like a useful addition to the set of testing facilities, so more power to your elbow.
Any of the OS/X devs out there might be interested to know that you can specify this as target OS in Travis which gives very rapid response and doesn't require a new release to CPAN to test. I've found it very useful for catching stupid bugs prior to release.