CorelDraw used to have a "Trace" option to transfer bitmapped files to a vector format - it's one of those processes (like trying to get a MIDI file from a WAV) which is much easier the other way round.

Bitmaps are great for storing photographs ect, but suffer from the fact that as you enlarge them, you loose the fine detail and they get "blocky". Vector graphics consist of the instructions for actually drawing the artwork and describe things like the angles, width, colour, and curves of lines, the fill of enclosed areas (even allowing for graduations of colour etc. They are great for drawn graphic artwork, because they contain all the neccessary details and therefore should remain sharp at most magnifications.

I do have an .EMF file (enhanced windows metafile) of the mudcat logo, but because it's not very well optimised, it's just over 2 meg. I could E-mail it if you want. I'ts large enough for Tee-Shirts.