Just took a look at Allen. Here are the non-BCS/A-10 with significant NT streaks:
-High Point (B) - 7 NT's in 8 seasons, w. 1 PI. Last four seasons include an E8 and a F4.
-Montana (A-) - 7 straight NT's. A F4 and two E8's in last four seasons.
-Memphis (B) - Postseason 22 of last 23. Four straight NT appearances and 5/6. Not past 2nd round in last four.
-Rice (B) - jreitz this season, but before that, they'd had six straight NT appearances and 8/9. Two S16's in last four seasons.
-Cleveland State (B+) - Five straight NT's, 8/9 in postseason. A championship and S16 in last four. They dropped from A- to B+ after their recent S16 season. Some will point out that the NC dropped to the fourth season on the list, but for any team to drop in prestige after making the S16 is ridiculous.
-UWGB (B) - 4/5 in NT. E8 appearance in last four seasons.
-Yale (A-) - Five straight NT's, postseason in 8/9. NC and S16 in last four.
-Dartmouth (B-) - Six straight postseason, and 7/8. Nothing past 1st round NT last four seasons.
-Bucknell (B-) - Postseason 8/9, though last two years were PI.
-Wichita State (B) - Five straight NT's, though nothing past 2nd round.
-N. Iowa (B-) - 10/11 postseason, 5/6 NT, nothing past 2nd round in 4-yr window.
-Elon (B-) - 5/6 postseason, not past 2nd round NT in 4-yr window.
-San Diego (B) - 7 straight NT's, S16 in the last four.