Since the new IDN standard does not provide for backwards compatibility to the preceding standard, it will not be possible to uniquely address domains containing the characters (character sets)"ss" or "ß", until all browsers support the new standard.
Not being able to unequivocally address a specific domain would adversely affect the users' confidence in the DNS. To guard against this, DENIC will apply a two-stage process for initial registration of domain names containing "ß". The official launch of the domains is preceded by a so-called sunrise period of three weeks, which has begun on 26 October 2010, 16:00 (CEST).
During this period, only those domain holders, in whose name domains containing the letter combination "ss" were registered at the decisive point in time of 26 October 2010, 15:00 (CEST) will have the opportunity to additionally register the corresponding ß-domain in their name.
The landrush period starts at November 16 2010. Anybody can register any free de-domain with "ß".
Hans-Peter Oswald
http://www.domainregistry.de/...