Hi Chris,
Did you change the friendly name of the blog module to something else? Also, did you receive the build I sent through email? Feel free to give me a call today as I mentioned earlier in the thread. That's the most efficient way to deal with setup issues like this.
If the friendly name of the blog module has been changed to something like Publications, then you'll have to use a posting URL like the following:
http://www.mrjanitorialsupplies.com/web/metapost.ashx?key=publications
The friendly name is the name that appears in the dropdown list which shows all the modules you can add to a page.
Thanks,
Don