I have created Portal skin, Black and White, including particle effects and projectiles, etc.. This was my first time when I tried to make Portal skin and this took for me half-day, I tried my best to change particle effects and other colors to right and here is results. Read, ReadME file before using this, there is rules etc..
Also, thanks to quadstrike for AWESOME portalgun texture! Link for download: http://www.fpsbanana.com/skins/59938