Send a batch of emails, IMs, SMS or even voice messages with a new web app designed primarily for the iPhone called Notifu, released by RealMetrics.

Address is at http://widget.notifu.com/message/iphone/ for the iPhone app.

The site will also work in any browser as well at notifu.com. Simply add a list of recipient email addresses, IM handles or text or voice phone numbers and send a message to a group of folks quickly and easily no matter how they prefer to be reached with one step. Your message will be delivered to callers or voicemail via text-to-speech, and you don’t need an IM account to send messages to AIM, Yahoo IM, GTalk or other chat clients.

Signing up to register for a free account and you can save a set of contacts, get confirmation of message delivery and manage replies as well. Very useful for iPhone users and non-users alike.