I just wanted to say I don't think it is tacky to ask for cash--if that ends up being what you need most.
My MIL to be devised a chinsy poem basically saying that we have all the household items we need--now we need a bigger place to live.
We also included an option of M&S vouchers; we don't need anything really but we figure if we are tight one week we can use it on food shopping
I had previously started a registry at John Lewis, but had a big hissy fit when they stopped carrying the informal dining set I wanted and I only found out right before I was going to get the invitation slips. I wasn't entirely pleased with the variety there, although they do have lovely things. I think Debenhams has the best selection of cookware, for what it is worth.
Also, if you like Pier One, the manager at a store here told me they are loosely affiliated with The Pier in Britain-http://www.pier.co.uk/ --He said they often have the same merchandise a season or two behind the US stores, from what I see on the website he is exactly right. Unfortunately, the prices seem very adjusted to fit the Uk standard