the problem with these devices is a simple one,
what do you need at what time, are you an office worker that needs 24x7 email and web access, great this is the phone for you, the problem is when you get home, spend time with the kids, take the wife out to dinner, or go somewhere for the weekend and you have a brick in your pocket as a cellphone,
so you gut 2 options, buy a PDA/cellphone like the TYTN or a blackberry for work hours and have a simpler phone for leisure hours, so you dont have to carry around the brick, and keep moving the sim from one to the other depending on the time,
or, buy a decent phone, with Bluetooth and LONG battery life, basicly a workhorse, and a PDA, so when you need to sync your mail or access the internet, you use the bluetooth connection to hook up the pda to the phone, use the connection, and then, when you leave the office, you just leave the PDA at home or at your work, and just have the phone on you,
i remember when a friend of mine picked up a treo 650, i looked at him and said "dude, come summer you´re gonna hate that phone" the reasoning behind this is that while women have the purse to carry whatever they want with them, well, except those miniature dress purses, but anyways, us guys, have to handle between pants, shirt pockets and depending on the occasion, a sports jacket or suite jacket, and you know that if your PDA is large or heavy, your jacket is gonna look weird unless its a winter jacket or coat, in a suite or sports jacket, people are gonna notice you have a brick there, and in the summer, a polo neck shirt and a part of pants, and you have the pocket buldge where the cellphone is, theres a reason why apple decide to release the iphone in the autum, release it in the summer, and you´re going to have a cosmetic issue here, and come summer, my friend was selling his treo 650 becuase it just looked too weird in his pants and he had nowhere else to carry it,
now, some companies are addressing this issue, you have the motorola Q9 and the samsung blackjack series, which are thin and light enough to go unnoticed in the inner pocket of a sports jacket, then you have HP which released the 514, which is basicly a candybar phone with windows mobile, exchange and wifil, the problem is that some people will find it a bit too small,
but all said and done, im just saying, look at how you normaly dress, and look at the use you normaly give your phone before going for these beasts, if you can use atleast 1/3 of the features and carry it around without mothers pulling thier kids away from you, then go ahead and indulge youself,