Note to all.
If your ORGANIZATION is filled with creative people, empowered by a trusting soul that gives you rope to reach out and grow AND this "Yoda" of yours has helped you and your team master the 30day monster, then... you already work at Acton Toyota
For the rest of us 30 day slaves....
You really got to know yourself and the short comings of your rooftop before you decide on inhouse or 3rd party graphic designers. If you hire the wrong "kid", you'll be wasting weeks teaching them what you want and waiting for them to "get it". Then, after you invest the time into the little bugger, they vanish on ya (off to college, or where ever)
KNOW YOURSELF and YOUR SHORTCOMINGS.
If you understand the power of a strong visual message but are rarely the originator of these, you're really depending on the new kid to make some beautiful music. Art is like music, handing an enthusiastic kid a guitar that you can't play doesn't mean you'll get what you want.
I HIGHLY recommend you explore the "no ties" offer made by Justin, or, from a skilled design house that knows our world. You'll want a player that has industry resources (like stock image library) to produce a consistent look.