Experiences with DC-GFP

Hello - Now that NEC 2008 has been out for some time, I wanted to ask what folks are doing in regards to 690.5 Ground Fault Protection (GFP) and some of the products and solutions you have used to address this requirement. I read that there are two exceptions to installing DC-GFP and wondered if folks had any comments on those.

One exception is that pole and and ground mount systems with no more than two paralleled source circuits *and* with all dc source and dc output circuits isolated from buildings shall be permitted without DC-GFP. The second exception is that PV units installed at other than dwelling units shall be permitted without DC-GFP.

Thanks!