Technology blog TechCrunch has been hacked for the second time in 24 hours, on the day of the expected launch of the Apple tablet.

Yesterday hackers left a simple message, stating what a pointless hack it was, with a link published that led to a site hosting adult websites.

However the most recent hack featured an expletive-ridden message at site founder Michael Arrington.

The extensive message read: "So Arrington, how much did all the media coverage yesterday brought you in trough the welcome.html ad you forced people to? What a f***ing retarded move was that you t***. You should be thanking me and sucking on my f***ing b***sack for not deleting everyone on the box and publishing the MySQL, if that's what you want okay, I can do that."

The message also directed visitors to a website hosting links to hardcore file-sharing torrents. The hacker refuted that, claiming: "Also, you f***ing d**kwads from sites like Yahoo!, BBC and plenty more, where the F**K do you see adult content on http://******.com/???????? I mean honestly, are you f***tards also in just for the money?!?!?!"

Graham Cluley, senior technology consultant at Sophos, said: "To misquote Oscar Wilde for a moment, to be hacked once may be regarded as a misfortune; to be hacked twice looks like carelessness.

"You cannot help but conclude that someone has a personal vendetta against the site which will keep TechCrunch on its toes in the coming hours, especially as the uber-hot story of the imminent new Apple tablet computer is scheduled to be announced to the world. And that's the kind of news that normally would generate a lot of traffic to TechCrunch's website.

"It remains to be seen if TechCrunch's Michael Arrington is as glib about today's hack as the one yesterday, where he joked on Twitter that the Chinese or Canadians might be responsible."