After a few people including myself finding it hard to find a decent SharePoint 2013 logo, I decided to create one myself.
http://www.mediafire.com/?i5f5tzjrdasvawa
What’s included in the ZIP is the following – Fireworks PNG, Photoshop PSD and an Illustrator AI & a high res Fireworks PNG file. All vector based using the hex code #0072C6
As a side note, I hope I don’t get into trouble with Microsoft over this, if they can point me in the right director to their official logos etc. then I will remove this post.