FeedFactoryPro.com allows you to use e-mail to update your CMS and feeds.

While we can handle CMS for you, you can add items directly by e-mail using most standard e-mail software programs or a Weblog Client — a program specifically designed to submit items via email.

FeedFactoryPro supports moBlog - posts written in a mobile or portable device (such as a PDA or a cell phone), and sent using normal e-mail, or some software that uses XML-RPC protocol. moBlogging could be called the ultimate blogging experience, giving you the ability for write to your blog almost everywhere in the world.  The easiest way to do moBlogging is send e-mails. Right now, almost all the mobile phones can send a e-mail (having that option as part of the phone, or using a service from your mobile operator). XML-RPC clients are also supported.

In Blog by Email article, you can learn about how to set up this.

FeedFactoryPro.com offers an XML-RPC interface. We currently support the Blogger API, metaWeblog API, and the Movable Type API.  We also implement several extensions to the Movable Type API, in an API we call the WordPress API. If possible, your client should use the API variants beginning with the wp prefix.

Or

You can always develop your own!

Features

• Full iTunes support (both feed and item tags).
• Episodes can be added, edited, and deleted.
• A dedicated podcasting feed  can stand alone or be applied to any archive, category, or tag page.
• Support for multiple formats (or podcasts) with each format receiving their own dedicated feed.
• Podcast player (audio and video) that can be included in any post