I have seen a log of bloggers talk about tea dying their linen and thought I would add my two cents worth. I love tea dyed things and have done a lot of it on my embroidery stitcheries so when I was in at Shepherd's Bush last month I asked them about it. They told me that tea has acid in it that will eventually destroy the fibers of your project and they recommended that you coffee dye only. There is also a Rit dye out there that would probably be safer as well.
Hope this helps save someone's beautiful project.