I have uploaded a new version of my mediawiki calendar extension. I implemented some things people requested:
http://meta.wikimedia.org/wiki/User:Cdamian/calendar
I fixed some bugs with the "format" option. There are new options to set the date of the calendar and new views to show one or more days. Some examples:
== work next week == <calendar> date="next monday" view=days days=5 </calendar>
== christmas this year == <calendar> day=23 month=12 view=days days=4 </calendar>
Some options are redundant now. I might remove them at one point.
Some stuff that is missing: - doesn't use the users timezone - some strings and date formats are hardcoded at the moment
i hope you find it useful anyway, christof