2
I know that
Zoullou is working on a new version of extcal that includes recurring events.
The current stable version (2.0.4) doesn't do recurring events (you probably know this!). However, the features that it does have work very well. I've used it from v 2.0.14 right through to 2.0.18 without a problem.
However, the latest
dev version (2.1.6) does. Zoullou is careful to point out that, as a dev version, it's not intended for a "live" site but it's probably pretty close to being done now as he's been working on it for while and issuing quite a few updates.
Why not download the dev version and give him some feedback/bug-track advice? The more the merrier and the quicker the release version will be available