My team and I will have an official introduction up before launch, we are pretty busy putting the final touches on the service.
As for currency storage, while you can certainly store as much as you would like in your wallet at Coin Daemon, I do not intend for this to be its primary function. As with Paypal and many other ecommerce payment and transfer services, I expect most shop owners to use the service for its uptime and reliability and to move their payments to their local wallets after payments have been cleared and products delivered to their end clients. In fact, we will probably assist with writing scripts for cron jobs and scheduled tasks to pull the funds down from Coin Daemon to their local clients.
When I was putting together the Zen Cart plugin for bitcoin, I witnessed the need for shop owners to have an always available bitcoind rpc service with which to track and provide their clients with payment addresses. This is where Coin Daemon spawned from.
