phishing sites from apple website

You may have installed some kind of adware/spyware.

Please enable guest logins and log in as Guest. Launch Safari and test. Same problem?

After testing, log out of the guest account and disable it if you wish.

Mac OS X 10.6 Help: Creating a guest user account

Bouncing spam will do no good, since the senders are almost certainly using fake return addresses. All you'd accomplish is getting an "invalid address" message back.

Since you're now on probably dozens of spam lists and almost certainly will continue to get onto more, changing your email address is in all likelihood the most effective thing to do. Spammers do a lot to disguise their junk from spam filters, so stuff always can get through. I've found SpamSieve to be more effective at blocking than Apple's junkmail filter, so you can give that a try first if you wish:

http://c-command.com/spamsieve/

If you're using MobileMe email, Apple's junkmail filter isn't very sophisticated; most email providers' anti-spam filters aren't since they can't risk being overly aggresive and thereby blocking valid emails. If you use some other email provider, discuss the issue with your provider. Changing your email address is probably the only good solution, though. I've had to do that two or three times in the last few years due to spam. I use Spam Gourmet, a nifty free service that allows you to set up "temporary" email addresses for use with sites you don't completely trust, and that's cut down massively on spam. I've still had vendors from whom I purchased things sell my email address to spammers, though.

It's unlikely you have any spyware on your system unless the web site downloaded something that you then allowed to install. More likely you just had a delayed site hijack/tag from another web site (not Apple's) that popped up that window on a window close. Those aren't uncommon, particularly if you don't have the "block popups" set on your web browser.

Regards.

When I was shutting down the Safari window from viewing the Apple website, another window popped up saying I could register to win an iPad.

Sounds to me like you had a pop-under... these insidious beasts are spawned by sites with crappy advertising policies (not Apple), but are created behind all your other browser windows. There they lurk, waiting for you to close your other browser windows and find them, waiting to pounce on you, with no indication of from whence they came! You can tame such beasts with the use of a Safari extension like AdBlock (see Safari -> Safari Extensions).