Nutjob - there is a book called 'Phonics Workbook', which explains the scheme for teachers and parents. It is quite pricey, (£20 I think), but your library may have it, or can order it for a small fee - that's what we've done.
I'm very impressed with JP too - ds1 learned to read using Letterland, and did very well with that, but ds2 is using JP, which is going well too. The emphasis is on the sounds the letters make, which is the key to learning to read phonetically.
I am very pleased with the 'Finger Phonics' books - the trace the letter things that tilba described so well. Again, they have these in our library, as they are pretty pricey to buy, (c. £5 for a book with 6 letters in, I think). But it means children can learn correct letter formation at the same time as letter recognition, even before they can control a pencil well. Many children, esp. boys, are not ready to do a lot of writing until they are 5, but they can still learn to read, and with these books to form letters well too.
Katierocket - I taught my two letter recognition at age 2, by introducing just one or two letters each week. By the time they were 2.5 they knew all the letter sounds 100%. Jolly Phonics is idea for this sort of approach.