Hmm, things i remember from Nederlands, Vietnam and the US:

- sometimes you do not get an IP from the WiFi AP, whereas the laptop can -> WiFi access not 100% ensured

- GPS fix time abysmal without help by network, better use external BT GPS mouse if you can borrow / buy one!

- Skype sometimes very flaky connection, also remember when you add Skype ID to contacts directly on N900, they will receive an "add me" invitation from your Skype account -> this explains why Hotel skype Account message popped up one day / was trying to chat with me, and i was "wtf!?"

- i was not succesful in my trials to enable usage of card reader using h-e-n and adapter cable -> maybe you are luckier

- tile download using modRana works, but better prepare using jTileDownloader and those instructions on a desktop machine before

- cannot remember issues with browser, but would suggest installing Opera too, way faster and nicer tab / window / select text handling