Travel with iPhone or Laptop?

I'm hoping to travel Thailand and Australia over the next year. I was just wondering peoples opinion on whether I should invest in a laptop or an iPhone for travelling with. I need it for Skyping. Possible entertainment and internet access. Just really confused! Help!

Added (1). I need cheap n cheerful… And I heard the iPad isn't great for the price it is…

Ipad would be better

Both

  • Will I need an electrical/power adapter to travel to England? (I live in Canada)? I'm traveling to England next summer to visit some family for a month and I was wanting to bring my laptop and phone along with me. I have a Sony Vaio and iPhone 4 (I don't know if that makes a difference at all). If I need to get one, what type do I buy and where can I purchase one? Preferably not online.
  • When I unlock my iphone can I use a prepaid SIM card when I travel? I live in Germany and a friend sold me her iphone 3gs when her contract was up. She said the phone would be unlocked after a certain date but it hasn't yet. If i do this myself will I be able to use any SIM card? I have 1and1 for phone service and when I travel to the states I get a prepaid SIM from tmobile. Will these work on the iphone too?
  • What sim to use in USA and what travel money card to take? Anyone know: 1. A cheap mobile sun card that would fit in iPhone 4 that an Aussie could use in the states for a few weeks? 2. Best/ cheapest money/ travellers card to take?
  • What happens to the IPhone when you travel? So I was planning on going to Mexico and IIm from the USA and I was wondering can the iPhone still work normal like if I was still in the USA? Or is there a process to be followed?