I just mistyped twitter.com as twtter.com and was surprised to find that I was redirected to what looked like a Twitter survey / competition page.
The logo at the top of the page is presumably deliberately designed to fool you into thinking that it’s an official Twitter survey:
You’ve been selected to take part in our short, anonymous 30 second questionnaire. To say “thank you”, you’ll have the opportunity to receive one of our exclusive offers including a Airline Travel Voucher and Win an iPad2. Start this short survey now.
I tried going to twtter.com a few times and was redirected to a number of alternative domains, each with the same fake ‘quiz’:
I got bored of harvesting all the various quiz and survey related domain names (they actually had some really good names), but I collected around 70 and submitted them to the OpenDNS Community tagged as Adware.
Incidentally, if you’re not already using the fantastic OpenDNS service then I highly recommend it.