Want something really tough, but also REALLY cool? This is something I learned from Eric Johnson on his 2nd video.

Try making a chord like Bm x 2, 4, 4, 3, 2. Now play artificial harmonics 12 frets above on each note in an arpeggio. That is, you're fretting x, 2, 4, 4, 3, 2, but you're playing artificial harmonics on x, 14, 16, 16, 15, 14. You're kind of mirroring the image of the chord an octave up. It gives a nice, tinkly sound to the chord. You can also sweep pick this artifical harmonic arpeggio. You have to sweep with your right hand while outlining the shape of the chord an octave up with your index finger (but let the notes continue to ring, using a clean tone. DO NOT lift your left hand fingers). Kind of hard to coordinate, but it's well worth the time spent learning (Ending a song on a Major 7th chord artificial harmonic sweep sounds so cool and jazzy). One last thing... if you want to hear the tinkly chord just fret it and slap the guitar around 12 frets up. Using a single coil pickup on the bridge setting works best. Christoph - I can email you a sound file of any of the above techniques if you want to hear them.