I started doing my grocery shopping online a few years ago when I was working around the clock and had no time or energy to get to the shops. I used to order it online from work and get it delivered after I (eventually) got home. I was also travelling abroad a lot for work and it meant I could order it from wherever I was to be delivered for the day I got back or whatever, very handy. Now I am still doing it online because it is just blimmin' easier! Especially now with a young baby.
I have used Waitrose (Ocado), Sainsburys and Tesco in the past but now generally use Tesco as they seem to have a lot of good deals plus I joined their mother and baby club and they keep sending me coupons!
The only thing I don't like about it is that you don't know til they deliver if something is in stock or not, and if it's not you still have ot go out and search for it. I also don't buy all our fresh produce online because you never know what the quality is going to be like.
Yes and I am another unfortunate not in an Asda delivery area

Oh and I did a lot of baby related shopping online whiile I was pregnant too - Mothercare and Babies R Us both have a delivery service. In fact most major department stores do it now, including M&S.
I love online shopping !!!!!!!!