Edit: They were released now. But I'm still curious about why they were locked? Is there anywhere I can read up on how the system works so I don't have to ask all these newbie questions here? Also does anyone know how long before a simple to use wallet will be out? This text input system really isn't easy for people like me..
This is easy to explain. There are not "coins" in your wallet, there are "outputs" corresponding to transactions you have received. These outputs can only be spent in their entirety. So if you have an output of 10 that you received and you use it to send 1, then a transaction of 9 is sent back to you as change. As with any transaction, this one coming back to you takes time to confirm. Until that time the wallet reports that 9 of your balance as locked.