Thanks for your work on the Scripturizer plugin. It's working quite well, though the ESV tooltips could use a few tweaks, being fairly new.
One is to have uniform behavior when the verse references another translation. With my default as NASB, the ESV tooltip comes up still, unless I actually specify NASB on the end of a verse, in which case it doesn't. I think there should be an additional option in administration, to "Show ESV tooltips for other translations".
Prototype is rather heavy-weight for a simple tooltip, even the significantly smaller jQuery is a little much if it's not being used elsewhere. It would be nice to optimize that. The book "CSS Mastery" has details on how to do styled tooltips without any JavaScript at all. Ask, and I'll post those details.
Performance is definitely an issue when pulling a large number of requests from the web service. Personally, I think it's better to rely on a page caching layer than add another level of complexity, so it's more of something for the FAQ.
Thanks a lot, Nathan.