Using jQuery, what's the best way to automatically initialize a plugin on all current and future elements of a specific class?

For example, say I want all <input type="text" class="datepicker" /> elements to have the jQuery UI Datepicker plugin, including any I might create at runtime.

Essentially, I want to do something like this:

$('.datepicker').live('create', function() {
    $(this).datepicker();
});

But, of course, there isn't a create event I can use.