Not many feel comfortable with tying in the Hindu Yugas (or epoch cycles of time) into the Mayan 2012 calendar, though I've always found it hard to ignore similarities between the two.
Coast To Coast interview Joseph Selbie is an authority on the subject and happy to confirm there is indeed overlap on the matter.
Selbie starts around the 1 hour 18 minute mark above but the entire show is good if you're in no hurry. There's more here.
Update: The original content was removed so I've posted Kali Yuga information only.