Member Rara Avis
I investigated spellchecker.net last year, probably around July or August. Since there were quite a few UBB sites using them, it sounded like a good solution for us, too. Unfortunately, they were having a LOT of technical problems back then, making their service a bit unreliable. I could live with unreliable. But clicking on their link when they were down, as often as not, caused your current browser page to self-destruct, too - meaning you just lost that response you spent ten minutes entering. I decided it just wasn't worth those kind of headaches.
If I can find a little free time, I'll try to give them another trail run. Maybe they've solved their old problems?