If you go to Apple's website and search iPhone-5 in the search box or just go to this link for the search results, you'll see results for the iPhone 5. The following URL's are currently appearing there:
None of the pages load, but it's been confirmed that the new iPhone will be called the iPhone 5 now. Apparently there will also be a new iPod touch and iPod nano announced at today's Apple iPhone 5 event, because the search results also leaked this URL:
Apple's live iPhone 5 event starts at 10 AM PT/1:00 PM PST so we won't have to wait long to find out what Apple has in store for us.
Update: There is also an iPhone LTE in the search results, and iTunes 11.