What is the best equipment to access the internet, use Skype (VOIP), with wi-fi and small size?
Because Skype is one of your requirements, that narrows the choices to devices that have a native Skype client, or powerful enough to run virtual machine software (http://en.wikipedia.org/wiki/Virtual_machine). That currently only includes Windows and Linux on x86, Mac OS X on PowerPC and x86 processors. Even with Skype and Wi-Fi as the primary criteria, the list of choices is still very long because what is small varies so much on personal preferences. All of the possibilities below include Wi-Fi. Also assuming general Web surfing (no proprietary clients needed for music streaming or video playing): – For a larger screen and a keyboard, an ultralight laptop like a Sony VAIO notebook with a 10″ or 12″ LCD would be considered small (cost ~ $2,000+). – Tablet PCs are lighter than clam-shell notebooks with the same size screen. Prices are around $1,000+ – Toshiba Libretto (~ $1,900): A Win XP UMPC that looks like a miniature notebook computer. – Samsung Q1B (~ $775): A 1.7 lb Win XP UMPC