Huh, I thought it's a common knowledge. I ever had no idea, that someone created package for it (always used script started on hildon-desktop start).

Also, if you use any kind of wifi disabler (advanced interface switcher, etc), be sure to modify its scripts, as upper channel won't work after every disable/enable, otherwise. Same apply for things loading bleeding edge drivers (and unloading it again - bleeding edge drivers itself are working on all channels).