I updated the AADL search-by-keyword Firefox plugin. You can download it at this address: http://mycroft.mozdev.org/search-engines.html?author=Matt+Hampel
The AADL upgraded their catalog search recently, and one of the excellent new changes is clean URLs. For example, something like this:
http://aadl.org/catalog/search/keyword/Julia Child
is a valid address — even with the space!
But this also means that search plugins were borked; hence the change. Thanks to Katherine Lawrence for prompting me to fix this.
That mycroft page also has a super-easy form for creating new search plugins. You can load any plugin into the first field on that page to see what it looks like — the ID of mine is 33816.