ok, here is my little workaround for a goal seek. It might give some people an idea on how to solve their problems.
Download Zip File
Also, it is not copyright issues keeping apple from implementing those Add-in functions. Its obscurity. Only 1% of people actually load the add-ins. Less actually use them after they load them. Trust me. I taught Excel professionally for three years now, over a thousand students a year. And only a very few even knew what analysis toolpack was. (less than a dozen used it often out of all those).
Remember this is the "Spreadsheet for the resy of us". Not the Hard core pros. Not the scientific or research professions. We are talking small business and home users that only use the basic functions in excel. They wouldn't be able to make a nested IF statement if their lives depended on it. Much less anything in analysis toolpack.
I love Numbers, and am a hard core programmer of VBA (Professionally now). I would love to see applescript implemented, and know it is probably just around the corner (2.0 most likely, a year from now). Remember your audience for this new spreadsheet. Expect what they will be using it for.
Hope this download gives some people some help. I hope I see all of you on the boards here helping out others as well,
Jason