How to make a custom ADB Search for now:
(afterward, you will be able to search an achievement in the URL bar by typing "adb taking the mick", for example)
Chrome:
Wrench->Options->Basics->Default Search->Click Manage
Click Add.
In the box for name:
Achievements Database
For keyword:
adb
URL (the one that you can't change! The other two are just my preferences):
http://achievements....e.com/search/%s
Opera:
Menu button->Settings->Preferences->Search
Click add, and enter the same values as above.
Firefox requires an addon, Safari requires a terminal hack and Internet Explorer requires your first born son if you want to do so on them, however. I'll uh, look into this with other browsers if I can.