First - sorry to the many, many people whose questions I haven’t answered.  I’ve had a lot of work, which I’m thankful for, but if I have to cut back on something it’s going to be posting on tumblr.

Anyway - to your questions.

1) How to find an artist.  There’s no simple answer to this.  Almost every artist I’ve worked with I’d gotten to know personally from being around the comics scene. 

The Internet can be a great place to find artists, as can comic conventions.  Find someone you like, tell them you admire your work and politely inquire whether they’d be interested in working with you.

2) Choosing an artist - a lot of that comes down to personal taste and what you think would fit your particular story.  A couple things you should look for are - a) can the artist draw sequential pages and tell a story, as opposed to just producing flashy pin-ups? and b) how fast are they? 

But before you approach any artist, you should ask yourself the following:

1) Are you prepared to pay an artist up front?  No matter how great your story is, or how likely you think it is that your screenplay will become a movie…most artists are going to need to be paid a page rate instead of or in addition to whatever back end there might be.  That’s something you’ll negotiate with the artist, but understand it takes a hell of a lot longer for an artist to draw a page than for us writers to write one.  They need to be compensated for that time.

2) Is your story 100% ready?  The biggest mistake a writer can make is showing someone - whether it’s an artist, an agent, a producer, and editor etc. - a script that isn’t ready.  You usually get one chance per reader, so make sure you make it count.

3) Along those same lines…have you adapted your story into a comics script?  You can’t just hand an artist a screenplay and expect them to adapt it into a comic.  I’ve adapted a couple of screenplays into comics, and I was just hired to adapt one of my comics into a screenplay.  And although they are both visual narrative media, they are very different forms, and it’s important to understand that.

Hope that was helpful.  I wish you the best of luck in finding someone who will bring your story to life.