I'm very sorry you missed out on the applications, but unfortunately that also means you won't be able to get added to the waitlist or to another artists table. :( AA staff have changed the policy for adding new artists/table partners this year.
Most often announcements for the Artist Alley are made via social media. If you're interested for next year, try keeping a close eye on the Fanime Facebook page and their Twitter.
QuoteNo Combining Tables after Application
With the new processes we are implementing this year, the artists on a table cannot be altered after a table application is submitted. This enables us to streamline the application and selection process so that we can get decisions back to artists in a timelier manner. This also significantly eases the burden on AA staff post-selection and provides earlier replies to artists on our waitlist. However, this means that we are no longer able to offer the ability to add new artists to a table after an application is submitted. If an artist is not selected through the jury process, they will not be able to join another table.
http://apps.fanime.com/2015/artistinfo/
Most often announcements for the Artist Alley are made via social media. If you're interested for next year, try keeping a close eye on the Fanime Facebook page and their Twitter.