Im not realy a spiritual person... more of a round 'em up and crush their skulls type... so im not realy prone to getting into hte mumbo jumbo... But by my expereince, the chakras do exist... just there is a lot of crap out htere about them...
Chakras are gateways to conciousness, no else. They have no realy potential to create giant explosive energy balls of doom, tho the thrid eye chakra is most closely tied to psychokineses.
The seven main chakras are related to these planes, or mindsets, of consciousness...
base, red: survival
?naval?, orange: sexuality
solar plexus, yellow: will
heart, green: emotion
throat, blue: Identification and conception of ideas
brow, purple: higher emotional
crown, violet: 'Devine will', but i ratehr call it philosophical drive.
there are more than 7 types of chakra tho. These are just there primary... there are actualy over 100, but i dont particularily care beyond these and the palm chakras.
Personaly, i believe modern spirituality has some skewed ideas.