Crazy by Gnarls Barkley is expected to become the first music single in the UK to hit number 1 from just download sales. According to HMV it's the fastest-selling music download ever.
I'd love to see some up-to-date stats on what percentage of sales are now accounted for by downloads. I don't think I've purchased a physical CD in the UK for around 2 years now, whereas I used to purchase at least 20+ a year from my local HMV.
