Which version of Chronic is best these days?

There seem to be quite a few variations of the chronic gem

$ gem list -ra | grep chronic
bjornblomqvist-input_chronic (1.0.5, 1.0.3, 1.0.0)
blakechambers-chronic (0.3.0.2)
chronic (0.2.3, 0.2.2, 0.2.1, 0.2.0, 0.1.6, 0.1.5, 0.1.4, 0.1.3,
0.1.2, 0.1.1, 0.1.0)
chronic_duration (0.7.5)
evaryont-chronic (0.3.0.2)
fizx-uberchronic (0.2.0, 0.1.0)
hpoydar-chronic_duration (0.7.4, 0.7.3, 0.7.1, 0.7.0, 0.6.1, 0.6.0,
0.5.0, 0.4.1, 0.4.0, 0.3.1, 0.2.0)
jdl-chronic (0.3.0.1)
lmarlow-chronic (0.3.0.1)
mojombo-chronic (0.3.0)
moorage-chronic (0.3.0)
olauzon-chronic_distance (0.0.1)
rgm-chronic (0.3.1)
sethwalker-chronic (0.3.0)
uberchronic (0.0.0)

The rubyforge version 0.2.3 is quite old (July 7, 2007).

Which of these is the 'best' for use with Rails now. In particular,
I'm interested in integration with the TimeWithZone support in Rails.

mojombo-chronic seems to be the root git repo yes?