We're looking to add personal pages generator for our users, which is simple enough while all of them are on our domain. We also want to enable them to purchase their own domains through us, and serve these pages on their domain.
We currently use Google App Engine for all of our deployment and server needs, and it has been pretty great so far. Now the problem is that I can't really point a domain to single page handler on App Engine, thus I'll have to resort to an external solution.
We can easily handle the pages generation, the main issue I'm facing is serving a different dynamic page for different domains from a single server.
What architecture do you suggest? What technologies/platforms should I research? (We're looking at significant users traffic when this thing is up)