Hi all,
Jeff Young's rendition of M3 is incredible. This link takes you to his sketch which also contains some of the technical details used to create this stunning sketch. It is very much electric, but unlike a sketch transfered onto black paper, it is an inverted scanned image:
http://www.asod.info/?p=1295#comment-7878
While you are on Astro. Sketch of the Day, look through the Gallery. Scott Mellish features prominently. This fantastic Aussie sketch artist has produced some of the most extraordinary work I've seen, including the one of 47Tuc I noted here in post No. 17 below.