Yes, I see it there, it is what I use in 9.3. Since 9.3 locators are supported at 10, I assumed that this was there to support previous locators. We have a custom standardiser for 9.3 and its not clear how to create a custom standardiser at 10. I will have to investigate further.
(I also see the help for it that you need an ArcInfo licence to use the standardiser, but the licence matrix contradicts that and has a tic for all licence levels.[ licence : noun, license:verb in English])