Samsung Moment :: Low Memory / Rejecting Messages - Functions Turned Off

Recently I downloaded, Pandora Radio, a local movies widget, a bible, task killer, and My Coupons. At that point, my moment started giving a low memory message, it began rejecting messages and voice mail. Basic phone and message functions turned off, and it told you so, all because of low memory, the blue tooth wouldnt function. At what point, is this low memory function triggered and override the functions of the phone. How long will it be before we can just store our applications to the memory card