While we are waiting for LotRO Book 8 today in the US, EU players will wait untill Thursday 25th. This is still unsure information, but we hope twitter doesn't lie:)
We are currently tracking Thursday to release Book 8 in EU. Please note this is subject to final sign-off at the green light later this week
Also on Codemasters Forum Faya has announced
An official announcement about Book 8 will be coming out within the next 24 hours or so, however I can tell you informally that we're tracking releasing on Thursday, subject to a final green light meeting.
We’re also getting the final details from QA so I can finalise the known issues for the Book 8 patch and it's worth noting at this point that there are some important known issues, which will be detailed in the announcement mentioned above.
For those wondering about the size of the patch it’s going to be about 650mb.
As for a standalone patcher, I'm afraid it won't be ready for the Book 8 release but we are working with Turbine to get this to you ASAP. We'll also have an updated Book 8 full client sometime next week, all being well.