I have not had a chance to check it out yet1, but any iOS app built by a team of John Gruber, Brent Simmons, and Dave Wiskus has to be worth a look. They released Vesper yesterday:
Vesper is a simple and elegant tool for collecting notes, ideas, things to do — anything you want to remember. Use tags to group related items into playlist-like collections. Vesper imposes no system; organize and curate your notes whatever way comes naturally to you. Eschewing complications, Vesper's focus is on how it feels to use it.
Available at the App Store for $4.99.
[1] Busy, busy week...sorry for the slightly slow pace around here the past few days. I haven't even had the chance to download and play the new Kingdom Rush yet. ↩