languagelog is always awesome (even if they sometimes lean a bit heavily to the positivistic side), but today's two most recent posts are particularly noteworthy and worthy of recommendation: a long, wonderfully detailed piece on who/m, and a more rambling piece on the descriptivism/prescriptivism battle that somehow ends up discussing
Star Trek.
I strongly reccommend you head over and check them out.
www.languagelog.com