No, Access is not the right tool for that job. If you're developing an
ASP.NET app, I recommend Visual Studio. If you're using other server side
technologies, I don't know enough about those to make a recommendation. You
could try asking in a newsgroup devoted to whatever technologies you're
using.

I would say it's possible for a small site but impossible for anything
larger. This can't be done with the data access pages, but you have to
create a set of web pages using ASP or another web scripting language and
place these pages and your access database with a hosting solution. There're
lots of systems out there that'll create a webshop for you using your Access
database (some are free try googlin' "asp shop access").
If you want to customize it you'll need to know how to make the asp-pages,
connect to your database, list products etc.

However, Access is not a good choice as a web database. I doesn't handle
more than a few users very well, so if you're planning on several customers
browsing your website, adding stuff to the cart etc. at the same time you'll
need a database better suited for the web.
For this there're several. For example MySQL (free) and MSSQL.
The sites you mention probably have huge Oracle, DB2 or other big
databasesystems handling their products.
I run a small website with product sales using Access and that works fine,
but I know I'll have to upsize it if the traffic increases.

Jesper Fj?lner
Denmark