I have been a 30D happy user for almost six years, now and I know the camera like the back of my hand. I am an amateur photographer and I have been making my amateur photos for about 25 years.
I am very glad I have bought the 30D. It is a great, well-built performer, easy, intuitive and quick to use. I have even won a few competitions and sold some photos :). I have shot photos at weddings and my journeys through Scottish mountains, Turkey, Egypt and many others. It has never failed me and never broke down.
What I miss is higher ISOs & body image stabilization (unfortunately not a single Canon DSL has built in IS), lower noise at ISO 800 and above. Possibly, but not necessarily, a higher MP. However even the 30D 8.2MP works well at sizes up to 50x50cm (never tried bigger ones).
Hopefully my precious 30D will serve me in following years, unless I will manage to buy 70D ;).