Weirdly, I was just involved in an ubercharger thread at GitP where "multiple psionic lion's charge" came up...
One guy claimed that casting it multiple times would not work since you can only make one full attack per round and the spell does not explicitly grant extra attacks.
It doesn't explicitly grant additional attacks? He does know that you can generally only make one attack on a charge under normal circumstances, right? And that a full-attack is more than one, if you have a high enough BAB, TWF, natural attacks, or a flurry? Ergo, it does grant additional attacks.
And by the wording of the power, it grants you the ability to make a full attack in a round that you make a charge, meaning that if you manifest it more than once, you can make more than one full attack.
QED.
[edit] I don't believe it's quite so weird as all that, seeing as how I'm the one who brought it up. I am the one who originally cooked the idea up, after all.