One of the next standards battle that will arise is calendaring.

Tools to manage your schedule are already available in most corporate environments, Lotus Notes/Domino, Microsoft Outlook/Exchange … but there has been little development or innovation in this area in recent years - apparently all the attention has been put into email.

So what’s the problem? Don’t the current systems work? Well yes - apparently so, but there are still some things missing - seamless interoperability for starters, plus there is a lack of standards for things like integrating your personal diary in with your corporate diary.

From CNet News.com: Time is of the essence

That’s the impression here at When 2.0, a one-day conference where executives from Microsoft, Yahoo, IBM and Google, as well as a cadre of upstarts, have been discussing what could be the next, albeit somewhat surprising, killer app: calendaring.

In other words, the confab’s list of priorities includes helping you remember your child’s soccer match along with the five scheduled meetings you’re trying to make.