While "Sense 3.0" on Windows Phone 7 is a bit underwhelming (although that weather update helps), HTC is still interested in developing it further for our new OS. What exactly that means is anyone's guess because evidently, they're not talking.
In an interview with Forbes, HTC's head of UX, Drew Bamford said the following about Sense and WP7:
We have a good relationship with Microsoft so we’re continuing to work with them to figure out how to enable a Sense experience without breaking their model...Our expectation is that we will be able to do more over time.
Well, maybe even they don't know. But from an earlier report, HTC did talk about how they "...will innovate differently to improve the experience and to get some HTC unique and differentiated experience on Windows Phone 7 in the future." Once again vague.
So we'll continue to wait but to be honest, while we dig their mini-apps, we're not looking to replace our new UI anytime soon. But hey HTC, we'll see what you can do.