Yes, quite often. Especially when I'm at school. In the engineering computer lab I'll talk to myself when I'm working on programs and the guys around me will often either correct my thought process or steal my idea.
i plead the 5th :shame: haha i always think i see people talking to themselves but i come to find out they have those blue tooth things. though this girl christina at my work who never shuts up and keeps talking and talkng i do find talking to herself all the time.. the voices in my head scare me haha actually they seem to talk amongst themselves and i never know what they are talking about