"Build 604 contains quite a number of changes from the previous beta build (build 425) including slightly modified icons and a grey text message next to each contact icon's name actually explaining their current status (Online, Away, Offline etc).
Enabling the personal message to tell contacts what you are listening to currently (tick the option) will change your personal message to reflect the current mp3 you are listening to. Interestingly, when tested with a music video file in the current playlist the personal message is blanked out while the video file is being played. MP3 files listed in the playlist following the video file will continue to update the personal message.
You now have the option in your conversation windows to click on a link to bluemountain to search for new backgrounds and emoticons. This seems to be something of a coup on
bluemountain's part as it is sure to generate a lot of additional traffic to their site. Additionally, there is an option in the conversation windows to type in an item to search for. Clicking on search heads to msns search portal and returns the results to the person you are conversing with.