So here is what I used:

• Flickr account
• Latest WordPress code on a blog that is setup already
• Camera phone with data plan (Sprint in my case)

Steps to setup your moblog:

• Visit your Flickr account, log in. Sign up for a free account if you do not have one.
• Visit http://www.flickr.com/blogs.gne and setup your blog. You will need your admin username and password and the URI of your blog. Choose WordPress as blog type is that is what you are using. Flickr should find the MetaWeblog API for your blog.
• Visit http://www.flickr.com/account/uploadbyemail/ and verify that your account is setup to accept photos via email
• At the bottom right hand corner of the page, look for the “Upload to Blog?” column and activate that service. This will give you a final email address
• Visit http://www.flickr.com/account/uploadbyemail/blog/ and setup the actual post preferences for your blog through Flickr
• Setup a contact on your phone with the last email you get and email all your photos, one at a time, to that email. The subject of your email is the title of your picture and the text of the email is appended to the post.
• Post away. Flickr recognizes the email, sender and type of message and parses everything to make life a lot easier.

Caveats:

• No caching of pictures. Photos are stored on Flickr and hotlinked on your blog. That might be a good or bad thing depending on your purpose.
• Posts are published on your blog and Flickr when you send the email. Donncha (pronounced donn-ah-ka, thanks Andy) has a Flickr Blog this to Draft solution that is pretty cool. Check out InPhotos if you have not already.
• No categories support. Tags might work but I have not figured that out yet.
• Cannot email multiple pictures. Flickr just sees the first one.
• Videos cannot be posted.

I might write a plugin that allows videos to be embedded automagically into WordPress and even come up with a caching mechanism to archive photos directly on the blog. In spite of the fact that there are many existing plugins that use Flickr functionality in WordPress, I find the above method to be much more elegant as a moblogging solution.

This is the link to my moblog. The wonderful thing about a moblog is that it is quite candid and the photos are worthy of being saved. The situations and the memories are absolutely delightful to browse through in the future. If you have a moblog or have come up with a different solution, please leave a link and a comment for others to enjoy.

Filebrowser is SCREAMING to be integerated into WordPress as a simple, in-post gallery creator that does not break validation. Imagine posts as albums and post categories as album categories. You can even add a random thumbnail from a post as a teaser in the excerpt.