First, a very good article about creating (and maintaining!) data clustering with PostgreSQL. This made me think: wouldn't it be nice if the automated tuning wizards would give you a short article to read which discusses the proposed solution instead of just the "turn knob X" type of suggestions?
Also, Percona is hiring performance experts, including PostgreSQL ones. This is good news, since Percona is known both for conveying useful information and for the valuable source contributions they make to the product. Will we see a "high performance" PostgreSQL soon? (Yes, PG is high performance, I'm referring to their blog name here).