Apparently there have been posts around the internet. I didn't find them, another potential buyer did. Having said that, I think they are wrong. There is now a page on the Dell website with the monitor on it (marked as sold out) and also very briefly another seller appeared on amazon and the shipping arrival date (for any buyer) was given as the 9th to the 21st.
The Dell page has subsequently disappeared again. Not sure what is going on, but it's a good sign that something is!
I am really excited to get this monitor. I have a good monitor but the price of graphics cards pushed me towards a different upgrade path!