Heres some of my favorite Zep based websites, share some of yours aswell.
Planet ZeppelinPlanet Zeppelin is a fan website, it has a message board with some pretty cool people though the message board is slow (I go by GoingToCalifornia on there if you decide you go in, you can say Hi) The website also has a large picture selection and a Led Zeppelin radio which plays Led Zeppelin, solo stuff aswell as live tracks.
Royal Orleans-
Sorry but i had to disable this link, links to bootlegged music or any music download with out legal documented permission from the owner of the copyrights is strictly forbidden.
-Tokagima
Guild CaptainThis is a good websites for Bootlegs if your into BitTorrent downloads, if your looking for a message board to go and chill out in, this isnt one i would suggest, the people seem somewhat uptight there. I go there strictly for downloads. Also, i forgot to add that this website has 2 (i believe) crewmembers that are apart of the messageboard, they have their own forum where people can go and ask them questions about Zeppelin, its fun to go and read what they have to say about them.
Zeppelin PhotosThis is without a doubt one of the best photo websites for Led Zeppelin i have ever seen, they have TONS and TONS of photos, You can sort threw them by band member, year, famous shows, famous tours, Post- Zeppelin pictures aswell as Reunion Photos, etc.
Lyrics at AzlyricsThis is probably the best lyric website, Ive never seen any errors in the lyrics.
Information On The Theremin.This website has some information on the Theremin, its pretty good.
Achilles Last StandThis is a GREAT website, they have photos, clips of studio outtakes, you can listen to Led Zeppelin covers from other well known bands, The starship, You can listen to 'The Yardbirds live with Jimmy Page!' Which is a very good album that i have been trying to find in stores for some time now, and much much more, way too much for me to type here, go check it out!
VH1: Jimmy PageA bunch of video interviews with the Guitar God himself, Jimmy Page.
Led Zeppelin Electric MagicGreat website, well put together, has photos of the month, a good Multimedia section, the message board is great too, it has a lot of good people there.
Jimmy Page OnlineIm not sure if this is an Official Website or not but it does have a good source of information on the where-abouts of Pagey these days, aswell as upcoming events and such.
Manic NirvanaGreat Robert based website, it lists Roberts Influences, Bootlegs and Bootleg reviews, Magazine Articles, Lyrics, a good Message Board, aswell as a bunch of other fun things like fan-writings, caption the picture, trivia, etc.
Robert Plant: Official WebsiteThis is Roberts site, it has information on tour dates and such, you can also hear his new song Shine It All Around if you click the Music link in the bottom right hand corner.