I wrote a long Glee spoiler a week ago in which I discussed several things, including the fate of Klaine. A lot of people assumed that one very big spoiler was incorrect. I am publishing this now to back up what I said last week.
Yes, Kurt does indeed have a blonde love interest. According to TVLine's Michael Ausiello, this new character, apparently named "Adam" is being played by British actor Oliver Kieran-Jones. He's the head of the NYADA Glee club. (NYADA has a glee club? Why is Rachel always in dance class?) This character will be in a recurring role in Season Four, and they may consider extending his contract to season five. Source.
This is what the guy looks like:
He first appears in 4X11 and he will be singing "Baby Got Back.."
By the way, the episode title for 4 X 12 is called "Naked." Hooooookay. I hope he has a personal bodyguard or a bullet-proof vest. Notice that we got this information as soon as Kurt got into NYADA?