Previewed at WWDC, launching in the fall.
IBM Previews Lotus iNotes For iPhone
Dubbed IBM Lotus iNotes 'Ultralite', the web-based application built on Lotus Domino Web Access will provide corporate email, calendar, and contacts in a specially formatted iPhone version. Several preliminary screenshots are available, though IBM notes they are subject to change. We've mirrored a few here:
The software has been expected since January and will be released later this year.