More information about the Dark Energy Crystals token will be coming out over the next month or so. As for the alpha and beta pack tokens, we will simply be representing unopened packs as tokens so that they may be traded more easily on the Steem Engine market.
So if I buy a beta pack it will show up as a token on Steem Engine? Is that working now or is a future update needed?
This is planned to be in a future update, hopefully within the next couple of weeks. You will likely need to deposit / withdraw your packs into the equivalent steem engine tokens like you need to do with STEEM right now to trade on the market.