I stopped using Vesper about a year ago, but it was a well-designed little app. I really dug the typography, and it’s syncing engine was fast and superbly thought out. Somewhat bizarrely, Vesper’s launch even got a decent amount of coverage from Microsoft, since the syncing engine was built on Azure’s cloud service.
Vesper’s development came to a halt after Mr. Simmons departed for the Omni Group. Mr. Simmons was never replaced, and future releases, including planned Vesper for Mac, were assumedly shelved. So it goes.
Update: Per Mr. Gruber, there should be a full post mortem tomorrow.