Gmail plug-in Boomerang is now available as a mobile site/app. Boomerang allows you to schedule Gmail messages for delivery in the future. The annoucement was made this afternoon in a blog post by Boomerang's developer Baydin, Inc.

We've been big fans of Boomerang's integration into the desktop version of the Gmail inbox. Last month, Boomerang came out of Beta and began charging for scheduling unlimited messages. Gmail users will pay $4.99 per month and Google Apps for Domains users will pay $14.99 per month for unlimited scheduled messages. Free accounts are still available that allow 10 scheduled messages per month.

Linking your Gmail address/account to the mobile site/app will get you a 30-day free trial of the Pro ($14.95) account. After the 30-day trial is over, the mobile site/app cannot be used with free accounts.

A version of this article first published as Boomerang Allows You to Schedule E-mail Delivery in Gmail on Technorati.