It seams like forever ago Alex Deacon (VeriSign) and I started work on the Lightweight OCSP Profile for High Volume Environments, well it turns out in ended up being a standards track document and is now in IETF WG Last Call.
The current version of the document can be found at:: http://ietf.org/internet-drafts/draft-ietf-pkix-lightweight-ocsp-profile-08.txt
I wont be able to make IETF 68 which is in Prauge this year but I hope that this represents the last phase in getting this document done and out the door!