If you scour the internets, you won't find many ppts, xlss or pdfs with a real online media plan. Those that plan the plans don't hang that stuff out for public consumption. Wait, other than public entities like state tourism offices who rub up against online advertising, but still really like the magazines and TV. I'm not specifically sweating the cowboys in Wyoming (because it's the same story state by state), but the online spend ratio is really low and there is no detail; so lord knows they are probably buying high CPM crap and don't even have a sponsored ad when I search "go west young man".
For those of you looking to advertise online or recommend that your clients do, Harry Gold has a lovely post today at ClickZ: The Anatomy of a Great Media Plan. Start there and title your slides. Do some research stuff, think and then fill the slides in. Present these slides to those with the money (client, board, committee, owner) and you might have yourself a successful meeting.