According to http://blog.primefaces.org/?p=2436, PrimeFaces 3.5 was just released. Into the the NB731 we should bundle the latest version as usually.
We are heavy users of Primefaces, and have been testing it extensively on our fairly large JSF projects. We have spent the last week upgrading two of our projects to 3.5 from 3.4.2 and have not really had any issues. Not in the hands of customers yet, but it seems like a solid release.
One humble vote for bundling 3.5.
Targeted into the NetBeans 7.3.1
Fixed in web-main #dc8ce38ac491 (javaee7 branch for now).
Integrated into 'main-golden', will be available in build *201303042300* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Martin Fousek <firstname.lastname@example.org>
Log: #225740 - Upgrade Primefaces to the latest one