Need good suggestions on this one - anyone?

I am designing a database in Oracle 10g Express Edition - Database looks fine and I am in the final phase.
I am twisting my head over (have been looking at websites to see how they do things in general and am not yet convinced) how to create the process booking request on my site when it comes to how a customer will be registered.
I am creating booking requests on 6 categories: hotels, vacation rentals, camping, home exchange, tours and flights (only business charter flights).
I have started with making the Customer table where customer is identified with a number and same Customer ID can be used in all booking requests for that particular customer. Now... it is unpopular to have to log in to be able to book things, maybe it is something that is supposed to be or maybe not. So I am thinking and twisting again, my head i.e., how to do this? What would be the ideal process of creating a booking and what would be an ideal identificator on customer? In this world of spam I do not want to use customers e-mails for mailing news etc., so that is said.
Should I let the customer write his/her info again and again in every new request or should I keep some sort of register on them?
Anyone who has been around with this dilemma?
Suggestions?
Smart ideas highly appreciated :)
Anyone? ? - Obviously I am not the most experienced one - therefore need the forums even more.. I would appreciate a discussion on this one - since I am sweating over studying Oracle process ;)
Hrefna
Message was edited by:
Hrefna
null

Hrefna,
We had the same problem when we created www.teetimes.com which is a golf course teetime website for hundreds of golf courses. What we ended up doing is what most web sites do, let the user create a user id and password pair. We also asked them to pick out two challenge question and give us the answers which we stored and used to validate a request for a forgotten password. You have to make sure there are no duplicate user/password pairs by the way. This allows you to give the user a 'global' identity which we used to let them play on any of the courses we served. You might also want to filter for bad words and sql injection.
Hope this helps
Bob R

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