Those functions were mainly wrappers around YUI functionality to do that. In 1.0, that kind of selection is done via the Element.select method which uses DomQuery under the covers to find things via CSS/Xpath - it's much more powerful and faster than the old methods. See the blog post on DomQuery for examples.
Up until this point, I never bothered to read up on DomQuery, as I didn't think it was anything I would be using - wow, was I wrong. I had no idea exactly what it was for and how powerful it was until looked into it after your reply. I just used it to do what I needed in 2 lines of code instead of the 20 or so lines used to re-impliment getChildrenByClassName() and a for loop.
Thanks for your help, and thank you Jack for DomQuery and Ext. It's great.
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