I downloaded this script, and it was great but a bit buggy. The messaging menu didnt light up and the messages didnt show up on the menu like "echo123 0min" for some reason, and it didnt work if the skype window was closed and running in the background. So, I tried to improve it - now the messaging menu lights up, and it uses the cruddy skype dbus api to integrate better with skype. It also sorta works for group convos, just set the chat topic to include everyone's names as they are on skype. It works for me in both maverick and in natty (after I upgraded).
Please do tell me if it works for you. (attached) See the file called INSTALL for how to install my version. Do not use ~ when replacing the /path/to's, you must use the full path, i.e. /home/username/whatever
What is more, if you are on natty, you can remove skype from unity's top bar completely! All you need to do is open terminal and enter "gsettings get com.canonical.Unity.Panel systray-whitelist" - this will get this current whitelist for the notification tray. You can remove skype from it by doing:
gsettings set com.canonical.Unity.Panel systray-whitelist "['JavaEmbeddedFrame', 'Mumble', 'Wine', 'hp-systray']
Ah the joys of open source ^_^