Generally, I prefer for other teams to work on UIs, mainly because there's so many types of UIs that can be created to do many different things.

I do have two guys that make occasional contributions to condenser (code base used by hive.blog), since it's an open-source project and several projects rely on it. We use that as a way to test new core features we're adding to the blockchain code that need a UI interface.

On the swap portal side, we develop blocktrades.us, of course. One of our main goals for that now is to add support for cheap Euro bank transfers. This should cut costs a lot for people to exchange between Hive-based currencies and fiat currencies (especially as it will allow them to avoid the high transaction fees associated with a lot of the intermediary currencies like BTC and ETH).