myxwiki.com is kinda long and I had a hard time making out the x in the middle. How about myx.wiki?
Well it’s a XWiki instance 
Indeed that’s interesting, I missed that there was a “.wiki” extension now. But “myx” sounds a bit weird.
Interestingly someone has “xwiki.wiki”.
myx, myxwiki are available.
app.wiki can be bought for $5886
See https://www.namecheap.com/domains/registration/results.aspx?domain=my.wiki
Too bad that x.wiki is taken (same for my.wiki).
Would have been nice for xwiki.org indeed.