@Dev today is the day, right?
XDN hardfork source code will be released right after FCN hardfork. FCN hardfork will be on the block height 1297000, now we are on 1296417, so expect XDN HF source code in about 24-48 hours and XDN hf in about 72h after that.
I may be wrong but I think Monero devs haven't announced anything about the merged mining XDN + XMR, and FCN + XMR on their main thread, here, on bitcointalk. If I'm correct, I don't know how productive this news (merged mining) could be if monero users are unaware of it?!
I think a good idea could be to contact your Monero colleagues and talk about it.
Last thing, I know this forum has became the "official" forum of XDN, but there are some people that have written on XDN forum from XDN website that are waiting for an answer from one of you devs.
Regards