Hey, did you catch that redirect? The Toad World URL is now community.toadworld.com. Don't worry -- you'll still find all the same great content here (and more on the way). We're just in the process of giving our Toad World site some well-deserved love. Stay tuned for some more updates coming this way.
Meanwhile, enjoy community.toadworld.com.
Exam 70-461 is the SQL Server 2012 Querying exam. There's some aspects of T-SQL that I've not used at all like XML, and certainly a few that I will want to brush up on before heading to this exam. Here's a few places I found for studying:
Don't forget that Microsoft often offers the Second Shot program where you get an exam retake for free. Current offers are available here: http://www.microsoft.com/learning/en-us/offers.aspx.