It is the same format as before and should match the already existing stream. Pretty soon we will be designating this the main stream and eventually stop writing to the old one, but I don't have an exact time frame on this.
If there are folks in here consuming the LJ Atom Stream I would love to hear about it and what you are using it for. If you switch to the new stream and have any problems, I would also like to hear about it. Thanks.