The secondary market for loans -- I assume they have been planning to announce this at PD'08; whether they'll pull it off is anyone's guess.
Increase in the minimum credit grade that may create a listing -- Maybe, but, if this is the plan, why did they just increase the maximum interest rate to 35%?
Publication of legal actions against defaulting borrowers -- They've already pre-announced that lawsuits will be filed in January; they may wait until PD'08 to tell us how many and whether any defendants immediately coughed up some cash. Don't expect more details than that. I'm not sure what the OP is referring to as "publication," but Prosper is not going to release any data about individual borrowers or lawsuits.
Increase in loans servicing fees -- Probably something best announced when lenders are on the opposite end of a modem, not in person
Increase in state rate caps -- They just did an increase to 36% (35% after allowing for the now-defunct bank draft discount), perhaps they'll add that percentage point to the caps. (Actuallly, the only reason I can think of to not have done it already is that they are waiting for PD'08 to make the announcement.)
A national Prosper license -- Nope. Rumor has it that Prosper is making excuses, rather than progress, on this one.
Increased options on the search loans feature -- Maybe.
more granular credit data -- Doubtful. Experian is most likely the bottleneck here, but I don't think it's a Prosper priority. (At best, they might persuade Experian to allow addition of "months since last delinquency," which TransUnion allows LendingClub to display.)
Credit report from more than one credit reporting agency -- Nope.
Reduced minimum bid size -- Nope.
Lenders can create their own portfolios -- Didn't they announce that when they created the portfolio system? Is it not implemented? (If not, it's a likely PD'08 announcement.)
Lenders can publicize their portfolios for other lenders to follow -- Ditto.
Stock options for long-time lenders -- Yeah, right.
3rd loans for borrowers -- Probably not until they have statistics on performance of second loans; even then, it's something else that is best announced from the other end of a modem.
Borrower refinancing their loans directy -- Prosper will stick to their "regulatory issues" story on this.
Revolving credit loans -- Nope.
The entry of corporate lenders -- Corporate lenders could already be lending if they wanted to; I don't know what there is to announce.
Changes (unspecified) to loan verification -- Doubtful.
Streamlined borrowing for AA-B credit grades -- Maybe.
So my predictions are, in no particular order:
(1) Announcement of lawsuit filings and initial results.
(2) A one percentage point increase across the board in state rate caps, made possible by elimination of the bank draft discount.
(3) Customization of the portfolios (which includes two of the poll options).
(4) The secondary market, if it's ready to go.