I am all for a good cause and one of the cause which I encountered recently in many mediums is the (Red). (Red) was created by Bono to raise awareness and money for the Fight Against Aids in Africa by teaming up with iconic brands to produce (Red) branded products.
(RED) is the colour of emergency and the colour of blood which is one of the ways HIV enters the system.
The iconic brands includes GAP, Emporio Armani, Apple amongst others. They also have a blog on the journal of the (Red). You can participate by uploading videos, leave a comment, download wallpapers, templates, posters on the official website, Joinred.com.