Rated 3 out of 5 stars

Από τον/την mi_ve στις Απρίλ. 24, 2009 · μόνιμος σύνδεσμος

Here is a different extension that changes the reply quote format:
http://nic-nac-project.de/~kaosmos/changequote-en.html

It suits my needs better. One bad point of that one though: you can't customise the date format as detailed as in the current extension.