I've seen several mentions of Aoki possibly being traded. Nothing serious and nothing in relationship to the Orioles though. Since the Orioles already traded for Rodriguez, I would imagine another Brewers trade would most likely be out of the question. But he seems like he could really be a good pickup for the Orioles now.
His line for the year is 296/362/375/737 with 33 BB to 21 SO. Overall in his major league career, he's put up a 292/358/408/766 line with 76 BB and 76 SO. Over the two years, he's also stolen 44 bases, but has been caught 18 times. He's also had relatively good splits.
RHP (298) 281/358/377/735
LHP (139) 326/370/372/742
RHP (684) 291/366/422/788
LHP (341) 293/341/382/723
He sort of reminds me of Nate McLouth. McLouth appears to better at most aspects, other than SO, AVG, OBP, and vs. LHP, but generally still similar. From what I read, Aoki seems to be a good defender as well. There's also the fact that they're both 31-year-old lefties, although Aoki is a few months younger and has a team option for 2014 at $1.5 million, which would be nice as a potential replacement option for McLouth. For splits comparison, here's McLouth's splits.
RHP (310) 296/366/422/788
LHP (86) 240/313/413/727
RHP (2530) 262/348/444/793
LHP (848) 224/304/353/657
Overall, I think he would be a good pickup, he's spent the vast majority of his career batting leadoff (189 GS), and all others batting #2 (25 GS). I think it would be nice to get his OBP up at the top of the lineup despite his low SLG this year. I'd imagine a deal consisting of Britton and Hader/Wright for Aoki and a low prospect would be fair for both sides, although depending on valuation of Hader, Wright, and the Brewers prospect, it might not as good of an option for the teams.