Gustaf,
On the IOS issue, I can confirm that CKEditor version 3.6.2 works just fine in IOS. This provides a suitable alternative to Xinha for anyone using Xowiki.
As far as a test environment for Xinha is concerned, I will happily provide you will access to the OpenACS 5.7.0 that I have been using to play with Xinha and CKEditor. I have in fact already put the bug-fix in place and tested it, so you could perhaps look at it and decide if this is satisfactory.
Regards
Richard