On Early December, The Pirate Bay was raided at the Nacka station, a nuclear-proof data center built into a mountain complex near Stockholm, which caused the website to go down.
Today (1st,Feb 2015) The Pirate Bay is BACK ONLINE and its main domain is now accessible via www.thepiratebay.se and the website has started serving torrents to the masses again, much to the delight of millions of users. The Pirate Bay's homepage currently features a Phoenix.
Currently, The Pirate Bay doesn't have any ads at the moment but the look and feel of the site is familiar, and the user accounts are working properly too. The "Contact Us," "RSS" and "Register" links are not operational yet and redirects to a 404 Error page.
Based on the recent torrents it appears that data loss is minimal. The latest upload was on December,9th last year, the same day TPB's servers were raided.