Megaupload.org used to be where you'd go to access the vast amount of films hosted by Kim Dotcom's Megaupload service. But once Dotcom was hit with US criminal charges, that site and many others were grabbed by the FBI, and visiting them produced nothing but a government seizure banner.

No longer. Today, a visit to Megaupload.org (NSFW) brings up what can only be described as softcore porn. Text ads for "casual sex," "adult affair dating," "adult cam chat," and "live sex cams" are surrounded by pictures of women in their underwear.

So how did this happen? In all likelihood, this is the same thing that happened last year, when similarly scammy-looking ads took over the main Megaupload.com page. The FBI used a domain called cirfu.net as a "name server" to re-direct traffic from sites it had seized. Then the Bureau apparently forgot to renew that domain, allowing someone else to purchase it.

Today, the WHOIS data shows Megaupload.org to have name servers at NS5.CIRFU.NET and NS6.CIRFU.NET, so it's possible that those domains expired, only to be bought up by someone who thought they could make a few bucks off whatever paltry traffic still heads to Megaupload.org these days.

How long Megaupload.org has been filled with sex ads isn't clear. The change was first noted by TorrentFreak, which reported it earlier today.

Other sites linked to Megaupload are also hosting ads, albeit less provocative ones. Megaworld.mobi shows text ads related to the Philippines. Megaclick.org hosts a similarly designed page, with ads related to horses and ponies.

As for Kim Dotcom himself, the proceedings over his extradition from New Zealand have dragged on for years. In December, a New Zealand judge ruled that the former Internet mogul must be sent to face trial in the US. Dotcom is appealing that ruling.

The FBI's press office didn't immediately respond to a request for comment about apparent hijacking of Megaupload.org. We'll update this post with a response once we get one.