Once you have the Tivo on your account, go under DVR Preferences, and check on Transfers and Downloads. It may take up to 24 hrs, but it will have the same MAK as the others on your account.
Original S1 (Recycle Heaven)
Series 2 (PLS, sold)
TiVo HD (XL, PLS, "652")
Juliet Basic (4XL, PLS)
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!