A whiteboard you can access anywhere

This month I came across a great new whiteboard tool for teachers (Scribblar) which enables anyone to start an online whiteboard session and invite their class to view it from any networked computer. Especially useful for home tutoring, when you can upload a screenshot of a document you are looking at and discuss it with a pupil in a different location.
It has all the text and drawing features you’d see on ActivBoard or Smart Notebook, but it does currently lack animation features. At Teachable we looking at ways we could allow easy import of Teachable lessons into Scribblar – do tell us if this would be useful.
I know there is something similar in the Glow system for Scottish teachers, but this is the first such tool I’ve seen that is free for all teachers to try. Using it across a school would cost less than £1000 a year, and it is so simple to use that no-one should require training.