Andrew,
I have the following setup and to be honest have played around with AAM and still am not sure whether I have it correct or not!
External DNS name of ISA server - isa.domain.co.uk
Internal DNS name of ISA server - isa.domain.co.uk
Internal SharePoint server name - moss.domain.co.uk
ISA Setup
Forward all requests for https://isa.domain.co.uk to http://moss for paths; /sites/*, /personal/*, /_vti_inf.html*, /_vti_bin/*, /upresources/*, /_layouts/*
AAM collection setup
Internal URL http://moss - zone default - public URL http://moss (this is not in my external DNS zone, I am running split brain DNS)
Internal URL http://isa.domain.co.uk - zone Intranet - public URL http://isa.domain.co.uk (this is in my internal and external DNS zones)
When I browse internally to http://moss/sites/portal/default.aspx I get the standard MOSS main page with mysites and mylinks links which work fine.
However if I browse to https://isa.domain.co.uk/sites/portal/default.aspx after loggin in to my ISA FBA page I get the standard MOSS main page without a mysite or mylinks link.
I know AAM was put there to simplfy things so I can only deduce that I am an idiot and I shall explain this to the SharePoint team in a couple of weeks at Tech-Ed!.
Any help would be gratefully received and mean that I don't have to take it out on them in barcelona!
Sean