First of all, hi, I just recently got into this hobby and ordered myself a hanaho hotrod se.. then I went insane and started making a cabinet, which will be done soon *school girlish laughter*.
And while I looked around the net for marquees I realized that any one of them involving the mame logo seemed to take it off of mame.net and massively over inflate it.
This disturbed me greatly as it detracts from the visual quality of the marquee, and being a graphics artist... well that hurt my feelings and made me cry.
So even though someone else has probably already done it, I've taken it upon myself to make an obcenely huge mame logo for marquees and whatever else which is included in the zip file i'm attaching to this topic. Let me know if you think I should make it bigger.

The file is a photoshop image document so you can just open it up and do what you will with it.
http://www.infernofest.com/mame/marquee/marqueetemp.zipok I guess i'm not attaching the file... *uploads file to site*