Marketing is the Issue

One thing I struggle with is Marketing IT within the business.
Getting the right message in the right medium at the right time is the challenge.
Also making sure the wording is business speak as opposed to tech speak and it is just enough.
Thought about posters (possible with the right design), IT Intranet (but not sure people naturally go there unless they are looking for something specific) but we do try and use the general Intranet notice board now and again but not for sustained marketing, Email newsletters (maybe but there is too much email around so why would they open it), attending department meetings and getting 10 min slot (think that is worth it), elevator pitches when you meet people (yes but people could start avoiding you!), getting everybody in IT to wear 'IT is Cool' T Shirts.(clothing could be a major budget item), Annual mouse mats with this years goals/ direction/ strategy (yes that could be cool)
Maybe it's a combination of these and others. I know we do a great job and want to get everyone else to know. Do I need one of these so called spin-doctors? but perhaps not as I do want it to be close to the truth. Ideas gratefully received.