WebOS:
"Simply put, webOS is absolutely gorgeous. As far as phones go, it's not just the only device we've seen which competes with the iPhone for looks, but we'd go as far to say that it bests the iPhone in some categories. The selection of fonts and font styling, use of transparencies, unified look of all of the elements, smooth transitions, and detailed application icons tie together in a really elegant way."
Browser:
"The webOS browser is obviously central to the operation of the OS as a whole. Since many apps on the device leverage web standards for their core operation, it could be said that the browser is the OS. But in terms of a straight-up web browsing, we found the Pre's out of the box option fantastic -- not only in speed and navigation, but with rendering and compatibility. Built atop WebKit (just as Apple's Mobile Safari), the webOS browser displays pages almost exactly as the iPhone does, though due to the fact that Palm is implementing a lot of hiding icons and app controls, it actually feels like you're seeing more content despite the smaller display. Additionally, its cache management seems better to us, allowing for fairly speedy back and forth through multiple pages. "
Multimedia:
"Palm definitely scores with its concepts about handling media in webOS, particularly when it comes to music. First, they've given users more than a single option to load media onto the device, allowing for a straight iTunes sync (more on that in a moment), but also giving you the option of loading media onto the Pre in mass storage mode. The phone automatically recognizes file types and throws them into the appropriate application regardless of location in memory (which means you can organize however you like)."
Navigation:
"We won't go into detail on every Sprint app included (especially not the NASCAR app), but we wanted to briefly talk about Sprint Navigation. Since most other smartphones of this class either don't come with on-board GPS navigation, or charge you for it, we felt it was notable that Sprint and Palm are giving away what feels like a very usable GPS app with the Pre. We used the software -- which does turn-by-turn / text-to-speech directions -- while driving from San Diego to LA, and it worked flawlessly."
Camera:
"Look, we're just going to say it: we love the Pre's camera. There are two things happening here that make it lovable. First, it's 3.2 megapixels, which makes it at least competitive with its contemporaries. Second, Palm has done something totally radical in webOS -- they've made it so the image processing is backloaded when you're shooting. What that means is that you can snap away without having to sit through the shutter lag you're probably used to, allowing you to actually use the thing like a real camera. Furthermore, the image quality we saw was more than sufficient for on-the-scene shots, with particular clarity and color in daylight shots, though a surprising amount of definition in low light situations as well. Oh, and did we mention it has a flash?"
Conclusion:
"Ultimately -- carriers and developers notwithstanding -- what Palm has done is not only a major feat for a company of its size (and its dire position), and we think it's an important step in the evolution of mobile computing. Just like the iPhone's notches up the ladder, and the G1's contributions, the Pre moves the game forward in a very real way. We know this won't be the last of the webOS devices, and we know that as Palm improves its products, so will Apple, RIM, Microsoft, Google, and the rest of the smartphone gang. Unfortunately for them, their work just got a little bit tougher."
More:
http://www.engadget.com/2009/06/03/palm-pre-review-part-1-hardware-webos-user-interface/