Zata|3 (D) for Talk Business (4/14, likely voters, no trendlines):
Blanche Lincoln (D-inc): 38
Bill Halter (D): 31
D.C. Morrison (D): 10
Undecided: 20
(MoE: ±3%)
Zata|3 (yes, the pipe is actually part of their name) is yet another polling firm I'm not familiar with, but at least Talk Business is mixing it up - for their CD-level polls, they used a Republican outfit, while Zata is a Dem firm. Unhappy (of course) about these results, the Lincoln campaign did something we haven't seen a whole lot of this cycle - they released a dueling internal. A Lincoln spokesbot also attacked the Talk Business poll for being "very unreliable" because it was automated (eyeroll).
Blanche Lincoln (D-inc): 53
Bill Halter (D): 35
D.C. Morrison (D): 4
Undecided: 8
(MoE: ±3.8%)
Note that I'm using the numbers with leaners as detailed in the PDF, rather than the non-leaner numbers cited in the press release, which have Lincoln up 51-34. Incidentally, D.C. Morrison is some weirdo conservative Paulist that I'd never heard of until, well, just now.