I've park most of my domains on Sedo too, except most of my IDNs Unicode domain names, as Sedo's system do not support them at present.
And I'd also like to find some website to parking those IDNs domain names... :shy:
Just wait for several days.
I'm developing a free parking system which provides two page for each domain name.
The first page will provided some web site templaes with a screen editable region for domain owner. You can join some affiliate program and post the affiliate links on it. The second is a frame which will redirect to sedo parking page.
All these services are free.