I recently posted a reply which contained a binary attachment. I made the post from my N810, but had to jump through hoops due to unfortunate state of things...

Since OS2008 has only unzip readily available but no zip (with only cursory seaching, I admit), and since tar and gzip are available by default on every tablet, it would be nice to be able to attach those types of files as well.

Also, <100 kB for some types of files? 300-500 kB for .zip and .tar.gz would be a lot more useful limit. Ask for donations if you need more hard drive space or bandwidth!