"Just buy a Nikon D70 and voila... you're done"
yeah then just sell all the Canon accs.. and lenses etc etc etc etc ..
Doesn't quite work out that cost effective then
I think Gulfstream chose Canon for a reason
so anyway ... i haven't heard of a replacment for the 300D as yet ... i think maybe as its such a great seller with no known weaknesses as far as im aware , great quality pics easy to use .
As was mentioned maybe a firmware update BUT have a look at the upgrades in the firmware before you decide ... and be very careful when you do it .. ive heard a few dodgy stories about it
good luck anyway