Thank you for your post.
Server Advanced no longer exists. All Advanced options are now available in FileMaker Server 13. Instant Web Publishing no longer exists, as you can now access files via a browser using WebDirect in FileMaker Server 13.
For more technical specifications of FileMaker Server 13, see the web page::
We'll know when they announce it, but upgrade with caution. It's quite common for newly released software to have an issue that stops your use of it in its tracks until a bug fix update is released. Fortunately, FileMaker 13 and 12 use the same file format. This should make it possible to host FileMaker 13 files from server 12--but with some loss of capabilities until server 13 is released and it can make "rolling back" to the earlier version less of an issue if you try out the new version and find that you need to wait for such a fix before putting the newer version into full time use...
Unfortunately non-CWP use with no user fee is not really an upgrade for our application. I regret paying for the maintenance.