Online Flashcards

Found this on Jane's E-Learning Pick of the Day:

Knowtes is a flashcard-based learning community;

"Knowtes optimizes your study. By adding a card to your Knowtes memory, it becomes due at optimized intervals. The Knowtes Adaptive Learning Engine then adjusts how frequently you have to study cards in your memory based on how well you do on them. No more wasting time on cards you already know by heart. You can even visually watch your cards move from short to long-term memory as you study them!"

This is similar to Flashcard Exchange - I'd be interested to hear from people who've been using either site to see how they compare. I just created a few decks of GRE words on Knowtes. The neatest thing about this site I think is that you can share your decks with others. This could be great for a language classroom.