Quicksilver for Tiger available right now

Blacktree just released version β40 of the wildly popular Quicksilver, "an evolving framework for accessing and manipulating many forms of personal data."

β40 Requires Mac OS X 10.4 Tiger, but Panther users can still download the older β36 version.

That was a close call. I couldn't install Tiger on any Mac I use regularly without Quicksilver compatibility.