The xxxHolic-Tsubasa OAD website has updated with a change in release dates for xxxHolic Volume 15 and TRC Volume 27 both of which would be on sale with Part two of the OADs. Both have been pushed back a month.
TRC Volume 27 (also available with OAD) - on sale May 15 xxxHolic Volume 15 (also available with OAD) - on sale June 23
On a positive note,
The second xxxHolic-Tsubasa OAD radio show is up at Onsen.ag. Today's guest is Kurogane.