Source:

http://bits.blogs.nytimes.com/2010/08/27/google-acquires-angstro-a-social-networking-start-up/

Note: It's Ångströ with å and ö, not Angstro. NYT doesn't want use those characters in the title and in the aeticle itself.

there is no Å on english keyboard. the same for ö

This is of course true, but it's possible to copy/paste it from
http://www.angstro.com/node/75 .

Perhaps it could have hurt their SEO work about that if they had used those characters. And they might have been stripped from the URL.

maybe some one teaches you how to copy paste with mobile, then you can teach nyt ;)
*just kidding*

Exactly :) But really, iPhone is not my primary phone.

Related to the URL TOMHTML mentioned it's a good point,
probably
..../27/google-acquires-ångströ-a-social-...

can cause some problems.

I'm writing this with keyboard with å,ö and ä and the starting post was written with phone with ö and ä and å with some tricks :)