I have! I bleached it myself the first time but I have a lot of hair and it's long so I didn't get the most even result. After that I stuck with hairdressers! Bleach London is a good range for at home kits - it's in Boots. They specialise in grungy cool hair rather than commercial 'covering greys' box dyes. I'm pretty sure they do a bleaching kit, as well as a white toner, which is what you'll really need to get the silvery look.
If you are after a pearly silvery white I recommend using the Lee Stafford Bleached Blonde purple shampoo once you've got the toning right and you're happy with it. It's the best purple shampoo I've used for keeping the colour really white/lilac rather than toning it purple/blue of left on too long. That said the L'Oreal professional silver shampoo is also excellent.