I don´t think this is possible to do right now (or I haven´t found a way to do it yet) but I´d like to find a member´s posting history with the same ease I can see his/her feedback.
Why? Because there´s a very reasonable amount of "concern" about who you are inviting to your house, or whose house are you sleeping in, and the profiles can only give a certain amount of real info about that person. However, if that person is active on the forums, and you can see their views on a variety of topics, you definitely have a much better understanding about the "real" person behind that profile.
Ultimately, we all want to have a positive interaction with our hosts/guests, and reading each other´s posts is just another tool to maximize our compatibility and "guarantee" we´ll be having a nice evening, or conversely, an equally helpful tool to discard people who we suspect we may not feel entirely comfortable with, in spite of how their profile reads.
It also has a very interesting additional advantage, which is the fact that an active member on the forums is far more likely to be a more active member overall, something we can use as an additional "passive filter" to find individuals who are actually willing to help, so to speak.