This is really neat, but the main reason I type as much as possible is because my handwriting is awful. I'd gladly use a service that made my scrawl a bit more legible.
I learned to write pretty much by myself after my parents taught me to read and I didn't practice the m's and the o's exercises in 1st class (since I already _could_ write). This ended up in a horrible handwriting, which a lot of teachers criticized without offering any solution.
At the age of 14 I received an old metal dip-pen and I loved it but I didn't like the outcome, so... I started practicing, writing alphabets, letters, words, sentences, just for the pleasure of using the pen and finding the right shape for each letter. It is still a work in process though as I sometimes change the way I shape one or another letter and I still from time to time write down a couple alphabets.
I'm not claiming my handwriting is now fabulous, far from that, but I'm at least not ashamed of it and would gladly use it as a font (where appropriate).
<- Tired of attempting to read other's scrawl
Anyway LaTeX has beautiful fonts, so I wouldn't worry too much about it yet.
Why, then, would anybody use anything other than a ballpoint? For me the writing experience is smoother with a good nib pen on decent paper, and I hate cheap paper anyway. Even good ballpoints aren't great here; the only exception I've ever seen are these ceramic tipped ones: http://www.leevalley.com/US/gifts/page.aspx?p=70130&cat=4,53... As a result of poor-to-mediocre ability to write, my cursive degenerated terribly for years, becoming a terrible illiterate scrawl that even I couldn't read. After I started playing about with fountain pens, I discovered that it was actually a legitimate way of writing, and faster than printing everything everywhere.
A few practice lines of zigs and zags and vertical dashes and C shapes makes a big difference.