Short and sweet. While 2 weeks notice is standard, its not always possible. I left my last job with slightly under 2 weeks notice, due to the people I needed to tell being out. I finally told one of their underlings, who then contacted the powers that be, who called me. If I recall, I gave notice on a Tuesday or Wed, and the following friday was to be my last day. Had they been in, I would have given my notice the prior friday, for a full two weeks.
I think the above example is fine, and slightly less is ok as well - people understand that most jobs start on a Monday, so sometimes 2 weeks isn't always possible.