Recently I ventured across Twitter Backgrounds Gallery, a website that showcases Twitter users’ backgrounds. The site also allows users to rate each others’ backgrounds on a star rating system. This system does not allow users to sign up to submit, but rather suggest your background to their Twitter account (@TwitterBGallery ).
This is a fun tool for you if you are on Twitter and have spare time to check out other profiles. Some of the backgrounds are a bit inspirational too! They even share some articles to help you make your Twitter background be effective if you want people to follow you. This includes concepts you should consider while designing, which are great for both graphic designers and novices.
Twitter Backgrounds Gallery also has a contest area where there are occasional contests featured.