Having owned a Palm Treo 700wx (Windows Mobile 5) and used several other Windows Mobile 5 and 6 phones, I am at a complete loss to understand the comment about copy+paste being a tacked-on feature. It always worked fine for me, and seemed fairly intuitive. Select some text with the stylus (there was probably a way to use the arrow pad, but I used the stylus a lot). Tap and hold the stylus on the selected text and a context-sensitive menu would pop up, where you would select "Copy". Put the cursor somewhere else, tap-hold to bring up the context menu, and select "Paste". Or, instead of tap-holding, you could also open the application's menu, open the Edit sub-menu, and select Copy or Paste from there.)
Let's look at some of the things I've just talked about to see how those concepts work on the iPhone. Stylus? No. Tap & hold? No. Context-sensitive menus? No. And, of course, the main point: Copy+Paste? No.
It's almost like the iPhone OS was designed by someone who's been locked in a dungeon for the past 13+ years and has never heard of right-clicking or context-sensitive menus. Maybe the iPhone OS designers just didn't get the memo that Apple is now embracing (pseudo-)multi-button mice and all that, or they'd be familiar with this whole concept.
I own a iPhone 3G 8GB. I've had it for almost a week. I never had or used an original iPhone, so I can't say how much of an improvement it is (or isn't). In general, it's pretty nice; I like it a lot. Having gotten to know my MacBook Pro laptop over the last few months (my first Mac ever) and gotten a feel for OS X, I think Apple has done a very good job of making it feel pretty much just like a Mac, much in the same way that Windows Mobile is a natural for people familiar with desktop Windows.
The applications I have gotten for my iPhone so far include: AIM, Mobile News (from AP), Units (a unit & currency converter), Epocrates Rx (a drug reference, including dosages, contraindications, interactions), Google, Cellfire (a local coupon/discount finder), PhoneSaber (turns your iPhone into a Star Wars lightsaber), magic8ball (shouldn't have to explain that one), HaHaHa (lets you put Joker graffiti over pictures...it's a Batman thing), Facebook (iPhone interface for the social networking app, I'm just starting to get into it...a little bit...maybe), BubbleWrap, Moonlight Mahjong Lite, PegJump, Morocco (an Othello clone), and Labyrinth LE (may soon pay for the full version to get more mazes).
I would like to get PacMan but I'm not paying $9.99 for one game like this (a lot of reviewers have made the same comment). I'm also waiting for a decent Solitaire game. The ones currently available are only so-so, in my opinion. I really liked the collection offered by Astraware for Palm OS and Windows Mobile. Astraware has already released one software title for iPhone, so I'm going to wait and see if they come out with more. But I'm an impatient kind of guy.