It works for me. A friend got the link from here, fixed one or two lines that caused errors in the coding and it works. I've been using it for about 2 hours now.
And no this add-on can NOT get you banned. The auctioneer site said that they had volunteered to take it down because blizzard was "displeased" with it. Its not an exploit, they just don't like the fact you aren't doing it manually. They probably feel gold farmers would use this.