The Apache Software Foundation has released versions 1.3.26 and 2.0.39 for Unices and Windows, addressing several bugs including the recently-announced chunked encoding vulnerability.
You'll find the source files here, and the binary files here. ®
Good thing they got off their asses and got this bug fix out ASAP. Now all I have to do is update my website.
Wine maketh merry: but money answereth all things.
For those running openbsd, the openbsd team has also issued a patch for the Apache port:
Credit travels up, blame travels down -- The Boss