Here is the Trillian Astra custom window Sidebar !
It's a transparent small, clean, sexy and flexible Contactlist that fits great in Vista and Win7.
This is based on MSP07's awsome Miranda Skin here: [link]
You can show/hide the frame, searchbar, statusbar, panels connectionsbar... to make the contactlist you like,docked, incredible small and nice looking or whatever..
Extract the Sidebar folder from the zip archive to your trillian skins folder (Usually: C:\Program Files\Trillian\skins).
Remember, this is an Astra Custom Window and must be selected under the custom window section, not the skin select section.