Oh, Behave! This week, we launched behavioral targeting for email through our PostMasterDirect group. This is a great development for us and will produce great value for clients over time by increasing response rates. It may seem like a bit of buzzword bingo since BT is the phrase of the year in the online media world, but it’s actually a product we’ve had in development for some time now. Our VP Engineering for list and data products, Whitney McNamara, had a great posting on his blog about BT and how we do it. The whole thing is worth a read, but the real gem in my mind (and what’s most consistent with Return Path‘s philosophy about consumers and targeting in…