Aero is a bitch to skin.
So here's the preview of upcoming Aero skin pack - the ports of Islander, Luna Inspirat, OST360, and Crystal.Systema.
This archive only has Islander Tango (pretty much the only polished version so far). The rest of the ports will be available from TuneUp (IDK how they're going to deliver them, but oh well).
Not open source, sorry.
UPDATE: Download the rest of my Win7 ports here: [link]