StringUtils in Velocity

It would be very helpful to be able to use form Velocity some useful string manipulation methods from org.apache.commons.lang.StringUtils.
For example, I had the need of a join() method when working with a list, for concatenating all its items with a separator I specified. It's way more elegant than iterating explicitly through the list and writing the code needed for this task.

I'm sure that there are many more methods from StringUtils that might come in handy at some point.