I recently read the new regulations and it appears that for prototype plans:

(1) You must now name the allocations groups in the plan document
(2) The restriction on the number of groups has been lifted.

Has anyone read this? Does anyone agree?

for an upcoming ASPPA webcast

Restating Plan Documents for PPA
and Revenue Procedure 2011-49

When: Thursday, November 3 from 2:00 p.m. to 3:40 p.m. ET

one of the highlights says:
Attendee Takeaways:

Cross-tested prototypes will no longer have a limit on the number of allocation rates, but new questions exist as to the availability of individual participant by participant rate groups.

Tom,

Were there any conclusions from the 11/3 webinar? Are individual rate groups permitted?

It's unclear. The PPA documents will be reviewed by the IRS, and unless the IRS says something before then, the document providers will find out once the IRS reviewers respond. I assume the providers will still place text in their document that allows a checkbox for each participant being in their own allocation rate classification.