I have been looking at the possibility of using the web help desk calendar for more than just displaying the ticket expiration dates. For instance, it would be nice to enter planned vacations in advance, i.e. date ranges rather than just selecting "on vacation" (similar to request http://thwack.solarwinds.com/ideas/3273)
In addition, it would be useful to be able to record things such as on-desk"on-call rotation duty or scheduled team meetings, for instance.
To summarise, I would like to be able to add entries to the calendar and possible set alerts as well.
An internal request "Case # 615872" has already been raised