How to send direct message (DM) to mutiple twitter users

I have got an fantastic app at tweetguru.net using which you can easily send direct messge (DM) to multiple twitter users whereas twitter allow to send direct messge (DM) only one twitter user at a time.

How does it work

First of all you have to authenticate this app with your twitter account.

Then put comma separated twitter IDs and write down your twitter message, finally click on 'Send Multi DM' button to send direct message (DM) to those twitter users all at once. Isn't interesting?