#1
I've been trying to see the bigger picture lately and the only explanation I've come across for putting rhythm and melody together is this.

http://everything2.com/index.pl?node_id=1300353

Hell, the author might even read these forums. I did find it odd he didn't mention chord tones / passing tones in the first part though.

So, is this a good base to start? I hear terms like comping and soloing being thrown around in other place and I can see the relationship to rhythm and melody but I'm not sure how to connect them. If you could point me in the right direction I'd appreciate it.
#2
well when he says there's an F#dim7 in the key of G major he's wrong; it's an F#m7b5. I'm not saying it's a bad article, but I'd suggest looking around on purely guitar-orientated sites if you want to learn about guitary things, such as, oh I don't know, ultimate-guitar's lessons?