Sequence diagrams without wasting time in Visio

Just stumbled across websequencediagrams.com which lets you create UML sequence diagrams online without having to fire up Visio or your UML editor of choice. Not only that, but you actually generate them from text (it always seems that I end up wasting time fighting tools for these diagrams).

For example, here's the diagram created by this text:

   User->A: DoWork
  activate A
  A->B: <>
  activate B
  B->C: DoWork
   activate C
  C-->B: WorkDone
  destroy C
  B-->A: RequestCreated
  deactivate B
   A->User: Done

Pretty nice, and well worth checking out, especially if all you want is a quick diagram without wasting a lot of time.