If you looking for an option to see the last topics, i don't think there is one, or otherwise i didn't found it yet, too.
It's possible to see the last posts (since your last visit), the link is on the upper right site under the logout button. The last post are also visible in the list of the songs.
It's also possible to see upcoming new songs in the "Release Status" section. If there is a change, on the status of a song (like, the song is finished), you should see it there.
sakichan, globule, winxero and other songmakers are still active in the forum.
If you looking for fixed or reuploaded songs, there is the "Official list of Broken links", Winxero is very dedicately to hold it up to date.
Hope I could told something you didn't already know.