Any reason not to use Posterous in the classroom?

At the beginning of July I gave a keynote presentation at the Kent EIS IT 2010 Conference and, just to illustrate the power and simplicity of Posterous, I posted links and reference materials from the presentation to a specially created Kent EIS IT 2010 Posterous blog. The more I use Posterous, the more I’m impressed by it – for blogging, posting video, creating podcasts… And there are options to make the blog private and to moderate postings and comments.

Genuine question coming up… Is there any reason not to consider it for classroom use?

BTW, the Kent Posterous blogseems to be working as an extended ‘back channel’ with 333 views in just a few days – another good reason to use it.