The IAB has released a draft document on “Review and Recommendations for Internationalized Domain Names (IDN).”
This note describe issues raised by the deployment and use of
Internationalized Domain Names. It describes problems both at the
time of registration and those for use of those names for use in the
DNS. It recommends that IETF should update the IDN related RFCs and
a framework to be followed in doing so, as well as summarizing and
identifying some work that is required outside the IETF. In
particular, it proposes that some changes be investigated for the
IDNA standard and its supporting tables, based on experience gained
since those standards were completed.
http://www.ietf.org/internet-drafts/draft-iab-idn-nextsteps-00.txt