There's about to be big changes as the new version of Twitter launches globally within the next few weeks. Now I don't have it just yet, but I have seen previews. The first thing I noticed is that the new interface takes up most of the screen, so for most people, the Twitter backgrounds on LOST SideSteps are about to become obsolete, save for this and these. They are both tiling backgrounds.
Of course for those folks who have giant monitors, the rest of the backgrounds on here are probably fine. Then again, I don't have the new version yet, so I don't know how the background placement is coded. Just giving you a heads up. Namaste.