It's not a needed app. It's pretty nice, though the developer had his N900 sink in some water somewhere and hasn't come back on afterwards that often.

However, I'm pretty sure the 100% Xorg bug can be fixed in other ways than uninstalling - although, I don't remember/know those off the top of my head, so perhaps simply uninstalling it is a good idea. Depending on how glitchy the post-int is, your icon MAY disappear, but if it does post back here and I'll do by best to guide you on how to fix it.