Here's a question that I didn't see directly answered. I'm going to be a new 1k in about.. oh a week (w00t!) and part of my nefarious RTW plan was to upgrade my united segments using SWUs. When reading the terms and conditions on United SWUs I didn't see anything that specifically excluded RTW fares (although it seems like they're excluded for LH). So .. you can upgrade united RTW segments with SWUs, right?