it would be helpful if you could tell us what you like and what you dislike about your 20D.
There's a whole range of new, lighter DSLRs from various manufacturers, e.g. the brand-new Canon 1000D and the 450D, the Nikon D60, the Olympus E-420/E-520, the Pentax K200D or the Sony Sony DSLR-A300 to name but a few. They all have their specific pros and cons and the choice really depends on your needs.
