There is no forum (that I'm aware of) on the AARO website. The seminar I refer to is an event held in Paris in February each year. Obviously, you've missed the one for 2012.
French taxes are a bit more straight-forward than US taxes are. In fact, most French investment funds send you a form at the end of the year telling you precisely what to declare on your French forms and where. Since the French forms are declarations (i.e. where you just declare your various elements of income and expense and don't do the calculations yourself) there is considerably less room for "creative accounting."
Besides, as the US is virtually the only country that taxes its citizens living outside the country (on worldwide income, no less), any investments you have in the US should probably be structured to US tax standards. The French side consists primarily of what you need to report, and how to report it so that they are properly classified to receive either the tax credit or the exoneration from tax that they are due. It's only really when you start investing in French (or other "foreign") investments that you have to consider the tax angle to avoid complications between how you're taxed in France and how you're taxed in the US.
Under the US-France tax treaty most investments in the US are either exonerated from taxes in France (but must be declared as such) or (more likely) are figured into your tax calculation and then you receive a tax credit based on the amount of French tax that was imposed on the income.
But you may want to take a look at the lists of attorneys and tax accountants put out by the US Consulate in Paris:
France A - Z | Embassy of the United States Paris, France (many of the people listed are AARO members).
Cheers,
Bev