Re: WOW! Nautilus and camera memory cards
The Canon Digital Rebel XSi (known as the 450D over here) is excellent as long as it isn't too small for your hands. Some people prefer the larger DSLRs like the 40D.
There are loads of built-in 'Picture Styles' if you shoot in JPEG, but to get the best you may like to shoot in RAW which records the data from the sensor without internal processing, and then convert using Canon DPP, The GIMP with dcraw or ufraw plugin, or (my preference) Bibble Pro which is not Open Source but is cross-platform and reasonably priced.
Before you criticise someone, walk a mile in their shoes. Then, when you do criticise them, you're a mile away and have their shoes.