BigString: Virtual Instant Messenger and eMail Shredder

Online instant messaging service that lets you access several IM programs (MSN Messenger, Yahoo Messenger, AIM and Gtalk) from a single webpage. Unlike other online instant messaging services, BigString conversations are self-destructing and automatically vanish from the screen after a short period of time. They can’t be copied from the screen or even screen-grabbed, they are not stored anywhere online either.

Apart from chat, BigString also gives you an email client from where you can send self-destructing, recallable, erasable, non-forwardable and non-printable emails to others.

Features:

IM messages can’t be printed, coped, saved or print screened.
Control how long your messages remains visible (from 5 seconds to 2 hours).
Manually destruct individual messages at any time.
Email client: Send self-destructing, recallable, erasable, non-forwardable, non-printable emails.
No sign-up required for IM (simply use existing IM client credentials to login).
Access all your IM accounts at once (registered users only).

BigString Intro Video