For today only BlackBerryInsight is offering a free copy of S4BB’s Wallpaper Megaplex for BlackBerry. It gives you unlimited wallpapers on your BlackBerry for life. The cool part is that it is already compatible with the Bold so no worries about that.
The only downside is that the app is desktop manager install only. On the flip side since it is a desktop install you can save it in case you need to reload your BlackBerry in the future.