Web Based GAL Management? Yes Please!
I'm not a huge person for putting myself out there and pushing products - but this is one of the exceptions - rDirectory -
I came across this software when looking for a nicer way to manage the GAL than installing the Support Tools and giving people access to AD....this was fantastic - nice gui, nice functionality, and the best thing is, the community version is free - no strings attached - the enterprise edition pretty much lets loose on every part of AD and your management feel of AD is entirely new - but for the basic tasks such as an HR person managing the GAL....this rocks...
http://www.namescape.com/
Enjoy