I recently finished up another ad illustration for Mojotown. A quick but fun job, they wanted to go with a very friendly vintage feel depicting their Mojoman in a classy 1950s gas station attendant's uniform.
Here's my initial sketch:
The clean-up vector illustration done in Adobe Illustrator.
And a rough design showing how they might be able to incorporate text (and which fonts to use) into the illustration. Ultimately, they came up with the final copy and finished with a nice ad.