Hi,

Background: I am looking to build a classified ads website. One of the
ideas I have is to setup a partner program which allows partners to
show the listings in my database on their own website. When someone
clicks through on a listing and puts in an enquiry (through an inquiry
form) or signs up to become a member the partner referral is recorded
... The whole process is transparent to the end user and they should
believe the partner site is the one that has all the content. In
short, some way to seamlessly co-brand my content for affiliates...

Question:
What are the options open to me in order to achieve this? I have heard
about XML, and skinned sub-domains ...

I would like detail on the above two (pros, cons and description of
process) and if there are other options to achieve this...

Two examples that I found of others doing the same but in different
industries are below:

1. TravelNotes.org has a link on their main page for "Vacation
Rentals" which leads to a sub-domain on onetravel that looks exactly
like the TravelNotes website

2. TemplateKingdom runs an affiliate program which allows affiliates
to display the entire range of Templates by templatekingdom on their
own site.. The entire buying process is transparent to the end-user
and TemplateKingdom never shows up anywhere.. The affiliate simply has
to insert a piece of code on their page to show the templates from
templatekingdom on their site.. (this is the option I like the best)

Any other examples would also be appreciated...

Thanks!