Only if away (can be disabled) would be good, and /ctcp $nick nudge or /notice $nick nudge would be good, CTCP being the better IMO. Kinda like /ctcp $nick page
Buzz, Nudge .. whatever, it's all the same bs.
Still though, totally scriptable (as proven above) and shouldn't be added as a built-in feature IMO.
A Script to shake the window like genius_at_work made above, but the window(s) should be returned to its previous state and position.
