Originally Posted by: kjproHi all, just want to know how arpeggios work in a solo as opposed to chord tones. Are they the same and if not what's the difference?

Jarsew gave you the right answer: arpeggios are broken chords, chords played one note at a time instead of all at once, ergo, using chord tones to play a solo is essentially the same as using arpeggios to play a solo.

These tutorials can show you how in blues:

http://www.guitartricks.com/tutorial.php?input=826

In rock:

http://www.guitartricks.com/tutorial.php?input=973
http://www.guitartricks.com/tutorial.php?input=980

Here's the basics of sweeping:

http://www.guitartricks.com/tutorial.php?input=985

And some advanced ideas:

http://www.guitartricks.com/tutorial.php?input=408
http://www.guitartricks.com/tutorial.php?input=211

I'll be updating those to High-Definition video soon. :)

You might also have a look at targeting chord tones in this series of tutorials on the basics of improvisation:

http://www.guitartricks.com/tutorial.php?input=876
http://www.guitartricks.com/tutorial.php?input=483
http://www.guitartricks.com/tutorial.php?input=491

Douglas Showalter also recently did a tutorial on chord tone soloing:

http://www.guitartricks.com/tutorial.php?input=958

Hope this helps. Have fun!