Tweetswitch is free web service that will allows you to tweets and receive tweets via instant messenger or via e-mail. It is very easy to use anybody and do not need to install anything. You can use your twitter user name and password for sign tweetswitch.
To get start simply add and configure the accounts on which you would like to receive your tweets. You can add three different types of IM services in tweetswitch. When add your account in tweetswitch will be given a contact to add to your buddy list. IM this buddy to post a new tweet TweetSwitch currently supports AIM, Windows Live Messenger, Yahoo! Messenger, Skype and gTalk.