Beware of email scams from people claiming to be eBay but the link actually goes to some site hosted by www.nivs.lv.
What it really does is that it opens a pop-up window that does whatever unscrupulous stuff while uses the original window to open a ebay.com webpage. I have the google toolbar that blocks pop-ups so I don't exactly know what the other windows does, but I'm not taking the risk.
Go here for the MovableType entry.