The tool is quite easy to use and has lot many useful features. No need to register, one may straight away start working on the whiteboard. Some features of the tool are
- invitation by email or copying of the URL
- uploading file
- option to save the whiteboard file for later reference
One major limitation i saw was allowing only 5 users at a time to work.
Please note the tool may not work if you access it from some corporate connection because the concerned port may be blocked ( i experienced it )
Good Useful Tool !!