The sholes 2.0.3 ROM includes the arc swipe by default unless you deselect it. It isn't an overclocked ROM, but SetCPU works well and my Droid is now running at 800 with no problems. MUCH faster transitions. So far it's been bugless for me, but it's only been overnight and an hour at work. Bluetooth, wifi, GPS all work with no problems so far. The multi-touch maps update created probkems for people with this ROM before the maps update came out, because it's running multi-touch before Google updated maps. I suspect there will be more speed bumps once Google releases a browser update to support multi-touchey goodness.
The weather only shows in Celsius when it's docked at night, though. That's going to be irritating. If I click on it to see the forecast, it is in Fahrenheit.
And lastly, the audio at full volume crackle is back.