And unfortunately, it may be the last version-- Dave Watanabe, the creator, writes on his blog that the rumors say Input Manager, which is the construct that Inquisitor uses to work the way it does, may be eliminated in Leopard. And that would leave a lot of plugins, including Inquisitor, out in the cold. It's not guaranteed yet-- some say that while Input Manager may be disabled by default, it'll still be allowed to be enabled when a plugin tries to use them-- but Watanabe says that if Apple ditches it completely, it would mean the end of Inquisitor.
Supposedly Apple claims Input Managers are a security risk, but Watanabe is asking Inquisitor fans to send them feedback asking to keep the construct in Leopard. Then again, Apple isn't really a company that takes advice on how to update its software, but losing plugins like Inquisitor would definitely be a shame.
Thanks, Space Taker!