My blog site has been hijacked & redirects to: http://searchinvented.com/?flrdr=yes&nxte=js&dn=smashingfeeds.com&fp=57S
Immediate reports from some bloggers suggest that removal of a possibly recently installed "Tweet This" gadget may be the most likely solution, when faced with this problem.
If you can access the "Page Elements" wizard, and if you have previously installed a "Tweet This" gadget on your blog, that's where you should start. Other blogs have the code installed directly into the template, and will have to use the "Edit HTML" wizard.
As with the "blogoholic.info" redirect, this exploit has been seen to cause corruption of the blog or gadget template, which may redirect you to "smashingfeeds.com" when you try to access the "Edit HTML" or "Page Elements" wizards. If you have this problem, you'll have to find out the blogID, then reference "Edit HTML" or "Page Elements" directly by URL.
In one case, the "searchinvented.com" / "smashingfeeds.com" redirect is being found on a blog that has a "falling snow" gadget.
After removing the offending code, don't forget to clear cache, before testing your change!