Here's a nice freebie for all you TUAWians. Today and tomorrow, you can download a fully unlocked version of Big Bang Reaction
, the same people who created the Big Bang Board Games bundled with most new Macs. The software is part of Freeverse's "Big Week" series of announcements and giveaways. If you like Reaction, you can buy the entire set of Big Bang Brain Games in when they are released in December.