iTunes 8 Compatibility
iTunes 8 was released yesterday, and after testing the new release one compatibility issue was found: multiple speaker selection currently does not work. A fix is being worked on and will be released as soon as it’s ready - iTunes 8 offers improved accessibility exposure which may allow for a better overall solution to the continued lack of a proper speaker selection API.
All other features appear to be working properly against the new release.
Update: The speaker selection bug was fixed in Signal 1.1.3.
One thing to be aware of is that the new grid view is not well suited to remote control clients. When a playlist is displayed in the grid view within iTunes, playing that playlist will only play the tracks within the selected grid item, and this is also true when playing the playlist through Signal. You can start the playlist and jump to a particular song, but only the artist/album/genre that song is contained within will be played. If the playlist is in the list or Cover Flow view then iTunes will play back the entire playlist as it normally would.