99 Ways To Play Better (And Sound Better) Right Now

(from Vanderbilly.com)

Quieting the Beast, Shielding a Strat

(from Strat-Talk.com)

Five Essential iPhone Applications For Musicians

Part 1
Part 2

Eric Clapton backing tracks

Sometimes you need to go from top level http://jammer.net.ru/mpjam_blues.html

(from Slowhand Blues Guitar forum)

Django Reinhardt

Guitar legend.

(from Guitarists.net)

Link Wray

One of the founders of modern rock.

(from Guitarists.net)

Rakarrack: Guitar FX For Linux

Basic Guitar Setup Tips

jfrets

A Guitar Teaching and tab Building Tool

(from DZone.com)

Guitar backing tracks

http://www.guitarbackingtrack.com/
http://gckingoftheblues.com/static_content/view/backing_tracks.html
http://www.bluesforpeace.com/blues-jam-tracks.htm

Getting Started Iinto Fingerpicking with 'Railroad Bill'

Assorted guitar links of the day

Here they go:

• Basic blues tips;
  
• Scales, scales, scales;
  
• Improvisation Tools: Pentatonic.
  

Tux Guitar

A Guitar Pro-like software for Linux.

Looking at the screenshots on the site, it doesn't look very much different from KGuitar, but at least this project is alive while KGuitar isn't.