The HTC Touch Pro 2. Lots of features, the UI is great (I use SPB Mobile Shell though, mainly because I've been using it for a few years and don't want to change), the phone charges with ANY micro-USB cable (from any USB source - laptop, wall wart, car charger, etc), bright and big screen (bigger, higher resolution, and brighter than an iPhone), and really reliable. Full keyboard is nice, too...
It has CDMA here in the US, but takes SIM cards so I can use my China Mobile, 12Call (Thailand), etc SIM cards in foreign lands. All my contacts, calendar items, notes, important files, unified texting, 3G capability (if you buy a SIM card with 3G Internet overseas - very cheap), great speakerphone, very good camera, an 8 GB microSD card for movies, music, and books for entertainment when on the plane, etc. It syncs my 8 e-mail accounts, contains a great GPS core (very fast acquisition) that, when combined with Google Maps, gives me highly accurate directions AND maps, even overseas (including Bangkok, Shanghai, Hong Kong, etc), and many other nice features.
It also has video out, and I have used that for PowerPoint Mobile presentations right off my phone. As well as displaying Word and Excel docs when I didn't want to lug my laptop along, and I knew my client had a projector.
I run Skype on it when in 3G mode; I receive Skype calls from my phone numbers (I have two in the US, one in Hong Kong, one in Taipei, one in Bangkok, one in Munich, and one in London) as well as normal cell phone (both US and overseas, depending upon the SIM card installed) calls.
Don't be afraid of buying a SIM card overseas; they are dirt cheap, you get a local number (which you keep, if you return every 3-12 months, depending upon the locale), it's incredibly easy to swap in and out, and you can take advantage of the features overseas (such as in China, where I can use my cell phone to buy food or drink at lots of places - no need to dig out some RMB).
I have a data plan here in the US, and I run the HTC built-in WIFI router software on the phone; in fact, I'm using it right now. It's my only Internet link - 3G to the phone, and the phone operates as a WIFI hot spot when I turn that functionality on. I don't have to carry extra devices, or cables, just a micro USB cable (available about everywhere), the phone and my laptop.
Basically, I wanted a single telecommunications device for ALL my telecom needs: Internet, messaging, all phone numbers. Power to do that, and handle US and Worldwide usage with both CDMA (Verizon rocks here in the US) and GSM via SIM cards.
The fact it's better than an iTouch for music and movies, is a pretty good camera (good enough for vacation and business photos), a map/guide, and a decent eBook reader means that I don't have to carry a ton of toys when I travel. My laptop, my phone, a USB cable, and a set of headphones (I use the Etymotic ER-6i in-ears; very comfortable, EXCELLENT noise blocking - better than noise canceling - and very high fidelity in a tiny package) is all I need for that 20 hour trip from Seattle to Bangkok!