@Pesti1ence: "when i tap the mana required and "break" the kaleidostone, the mana produced from it... is it permanent mana that i can draw on for the rest of the match?"
No. There's no such thing as "permanent mana". I don't think you understand how mana and mana pools work. This is a little simplified, but it should be all you need to know:
Say you have an Island. When you tap it for mana, it adds 
to your mana pool. This called a "mana ability," and nobody can respond to it. This means that your opponent(s) can't say "HERP DERP I CAST WRECKING BALL TARGETING THAT LAND BEFORE YOU GET THE MANA." You tap for , and is added to your mana pool instantly.
Then, in order to cast a spell (say, Preordain), you announce that you're casting it (say, "I cast Preordain"), then pay its cost. You can only pay mana costs with mana in your mana pool. When you pay that cost, the mana you spent on it is empti... (see all)
Posted By:
SnarkyOracle
(6/18/2011 6:09:04 PM)
not Horrible i ran a few in my domain deck worked out ok.
Posted By:
thaviel
(3/11/2009 8:44:00 PM)
this is best used in a time sieve/open the vaults deck. 
for a free card and an artifact in play. Then when you play open the vaults all the draws on the kaleidestones in your graveyard activate again making sure that you can have unlimited turns with time sieve.
Posted By:
mkniffen
(8/16/2009 5:31:31 PM)
Also useful for playing Maelstrom Archangel in a deck that can't afford to splash any other colours. And two mana to draw a card isn't really bad, if you're playing a colour that has difficulty with getting extra draws.
Posted By:
SocialExperiment
(11/6/2009 7:54:02 PM)
I bought a box of Conflux and instantly made a 5 colour deck.
These are brilliant. 2 mana for an extra card, and it only helps out later on.
On the odd times I dont have 1 mana of each colour by turn 5, these usually pick up the slack.
Posted By:
psyklone
(1/6/2010 7:12:54 PM)
Cantrips, filters mana, what's not to love?
Posted By:
Auteur
(1/22/2010 2:39:50 PM)
@machtoung i play a progenitis deck it is far easier just playing 3 corlors elvish piper(4) mindwrack leige(4) diabolic tutor(3) i can get progenitis from my library turn 5.
Posted By:
darkcider
(3/1/2010 11:28:07 AM)
At the time, those cards weren't in Standard so i was looking for ways to accelerate it. But now that the piper's back, I can see that being the way to do it.
Posted By:
machtung7
(3/29/2010 7:09:31 PM)
This card is so much fun, I love it.
I run a few of these in a casual metalcraft deck with Etched Monstrosity. An artifact cantrip for {2} is more than worth it to achieve metalcraft (or boost affinity for artifacts) in the early game without card disadvantage, and as soon as I can afford to play Etched Monstrosity, I should have enough artifacts anyway. Best of all, Etched Monstrosity is a good artifact creature even without this, so both cards are worth it even if I don't get both at the same time.
Oh, and nobody har mentioned how beautiful the art is?
Posted By:
Havrekjex
(9/16/2011 6:35:53 AM)
It's a handy tool for all sorts of cards, and since it requires no colors, can really help get out that Fusion Elemental or Maelstrom Archangel that much quicker.
The fact that it replaces itself means, even though it's one use, you really aren't losing much when you drop it. Not card advantage, really, but still useful.
Posted By:
DoragonShinzui
(4/19/2012 7:36:51 AM)