HTC Kaiser - also known as a TyTnII or rebranded under an network operator such as the O2 Stellar.
Had a HTC Prophet before it (Orange M600) and I love them, I don't have the issue most seem to take with windows mobile, the slide out qwerty keyboard is great for texting, the push email & blackberry connect mean I can email as easily as a text (plus with a carte blance data tariff it's free).
Opera mobile is a great web browser for checking sites whilst on the move, the wifi is great at covering the areas where I don't get HSDPA speeds and for fault checking wireless setups.
The "Tilt" on the screen makes watching movies on the train great (via stereo bluetooth headphones with A2DP control).
Camera takes perfect shots in good light, bit blurry in the dark but then so is my 13 megapixel samsung digi-cam which has supposed to have two anti-blur controls. Video's not great but good enough for catching the odd random clip.
Have an 8GB micro-sd card in it which is no where full even with a fair few vids and music on it.
Sync easily enough with my windows computer (calender and contacts with outlook) and MS are offering a nice online service which also backs up your phones contents to the web incase you lose/break it - or in my case upgrade the ROM from 6.0 to 6.1 - all contacts, texts, pictures, music and movies sync'd right back where I left them.
Have some classic games like monkey island one and two and a couple of emulators that work well, such as the gameboy, gamegear, snes and megadrive so always got plenty of games to while away the hours commuting.
As I'm out alot on my own with work my phone really needs to do alot to keep me entertained and also alot for work where mobile office comes in and this does everything I could need (even helps me get to where I'm going with tomtom and googlemaps apps using the GPS).
Can't recommend it highly enough for a handset that came out months prior to the original iPhone it's better than my mates 3G (haven't seen an S yet), well, for me at least - though saying that I'm chewing at a bit until my contract runs out and I can grab a Touch HD 2 with larger screen, faster processor and more ram.