Here's a rough writeup of the functionality included in the new Anonymous Listings addon:

The feature has been constructed as an Addon for the Geo 4+ software, which means you can enable/disable it through the Manage Addons screen in the Admin. At present, this is the only way to administrate the addon – there is no other switch in the admin – if the addon is installed and enabled, anonymous classifieds are possible on your site; if the addon is not installed and enabled, classifieds may not be posted anonymously. That brings up another point worth mentioning: only Classifieds (not auctions) may be posted anonymously at this time. Notwithstanding the whole no-admin-settings thing, the text/css of pages new to the addon (specifically, the two new pages involving the edit password) may be edited via the Manage Addons > Edit Text tool.

If anonymous listings are enabled, the classified placement process behaves as follows:

If a user is logged in, that "overrides" the anonymous processes. A logged in user cannot post a classified anonymously, nor can he edit an existing classified posted anonymously (without first logging out).

If a logged-out user attempts to access any feature of the Cart system that does not allow anonymity (currently, anything other than Classifieds), for example, if he clicks to create a new Auction or Add to Account Balance, he will be prompted to log in.

<tip c n>Note: As of 4.0.0RC7, users who view the cart while not logged in will not see options for order items that are not anonymous-capable. If no anonymous-capable order items are available, users will be prompted to log in when attempting to view the cart</tip>

If a logged-out user chooses the create a new Classified option, the listing process will ensue as normal, with an added step towards the end. After entering the details and images for the listing, the user is presented with a separate page showcasing a password generated by the system for this listing. In the current version of the Addon, this password is a randomized, 10-digit, hexadecimal (uses characters 0-9 and a-f) number. An example password is: f38a0db772. The user must record this password for use in identifying himself to edit the listing later. The user then clicks a Continue to Checkout link and proceeds with payment/checkout as normal.

Since anonymous users are not assigned to a User Group, they behave as though they were in the site's DEFAULT User Group in regards to the Price Plans they have available. For this reason, the anonymous addon will not allow anonymous posting if the default price plan is subscription-based.

Once an anonymous ad has been placed and approved and appears on the site, the poster (who has the password mentioned above) may edit it by clicking on the Edit button next to the listing on a browse page, at which point he will be prompted for the password. Correctly entering the password will enable him to step through the Edit Listing process as normal for that listing.