I haven't seen this discussed much, and perhaps it's been overlooked with all the other amazing accomplishments by Coach Izzo and the boys, but MSU is currently in the midst of yet another impressive feat: most consecutive weeks appearing in the AP Top 25 poll. According to the poll data at the AP Poll Archive site (a great way to kill a couple hours, by the way), MSU has been ranked in every poll since the beginning of the 2007-2008 season, for a total of 58 straight.
The last poll in which MSU did not appear was the final poll of the 2006-07 season (following MSU's second round loss to UNC as the 9-seed). The streak of 58 straight, ironically, is tied with Duke for the longest active streak in college basketball (Duke was also unranked in the final 2006-07 poll following their first round loss to 11th-seeded VCU).
Here are the longest active streaks:
MSU - 58
Duke - 58
Purdue - 45
Villanova - 38
Kansas - 26
(should be very interesting to whether MSU or Duke has their streak broken first, since both teams should be right up there throughout next season)