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bcornellAny suspicious email like this one can be forwarded to spoof@ebay.com for confirmation as to whether it came from eBay; spoof@paypal.com provides the same service for supposed PayPal emails.
The Anti-Phishing Working Group maintains a website that explains "phishing" (attempted account takeovers) and regularly reports on bogus email threats like the one Jon cited.
Also, eBay provides a free toolbar that has a visible alert when a browser is showing a spoof site.
One general rule about these spoof emails is that the English is usually atrocious (misspellings, poor grammar, etc.). That's no surprise, as they almost always come from outside of the US. The senders would get their due here: prosecution and jail time.