Pro comic writer Jim Zub has a blog where he's written a few entries on how to break into the comics industry. Well worth a read IMO!
The links -->
Part 1 - How do I break in? --> www.jimzub.com/?p=1725
Part 2 - Find an artist --> www.jimzub.com/?p=1767
Part 3 - Comic Writing --> www.jimzub.com/?p=1068
Part 4 - The Pitch --> www.jimzub.com/?p=1511
Part 5 - Pitch Critique --> www.jimzub.com/?p=1882
Part 6 - Comic Q&A --> www.jimzub.com/?p=1813
Part 7 - The Realities of Creator-owned Comics --> www.jimzub.com/?p=1953
In addition he links to Charles Soule's blog articles about Freelance work and Contracts called "Agree to Agree"
Here's the links -->
Part 1 --> charlessoule.wordpress.com/201…
Part 2 --> charlessoule.wordpress.com/201…
Part 3 --> charlessoule.wordpress.com/201…
Part 4 --> charlessoule.wordpress.com/201… - which talks about "Work-for-Hire" arrangements and so is probably the most relevant to most people just starting out.
Part 5 --> charlessoule.wordpress.com/201… - what to look out for in a contract!