Probably a country error, I believe the city list pops up per the country. Email Support@shapeways.com and they will get you up and running. Before you do that, what browser are you using? Have you tried a different browser?

I tried writing in Finland, but all it "popped up" was Finland again hehe. No cities at all.

Thanks for the speedy replies guys. Youknowwho4eva, I'm using Firefox, however I have a noscripts plugin installed - but that should not have caused problems since I gave allowances for this site. I don't have a script blocker on IE though, so in case that's the problem I'll test it out on Explorer first and if it still doesn't work I'll send in an email.