Ray,

>PS:  re Buenos Aires:  The site still shows a "proposed" date of August
>28-30.  Has this been firmed up?  My reason for asking is that my wife
>has agreed to come with me to Buenos Aires, and she wants to slot in her
>vacation time at work before someone else claims that spot.

It is not set in stone yet, but the venue is reserved and confirmed for that whole week.

Barcex