In general, it seems faster and all aspects are more refined. It doesn’t have a groundbreaking new usability feature (like Exchange support in 2.0), but it makes many aspects of using the iPhone superior. Search is a big addition, and makes for a fast app launcher.

A lot of what 3.0 offers is really on the developer end: you’ll see new features as app developers take advantage of the new tools.

However, there are several niceties for users as well. In addition to the obvious ones (copy/paste, search, voice memos, faster browsing), here are some that are not so obvious.