Before opening Spencer Roloson’s 2002 Tempranillo last night, Nena and I had tasted both their Palaterra blend and their Viognier…with mixed results. We really liked the blend a lot, especially for $16…but the Viognier a bit unbalanced and "hot" at the end. Tempranillo is another varietal (like Viognier) that I’d like to learn a lot more about. Sure, I’ve had some Riojas (which are mad with this grape) and I even had a couple Tempranillos while at dinner with Pam and Randy in Pittsburgh (at SiBA Cucina), but I really didn’t (and still don’t) know a ton about them. The…