Some Digital SLRs come with lenses and some you must buy separately. You can get DSLRs that have over 20 MP resolution but most have around 10 - 12 MP. They have many advantages over point and shoot cameras like shorter delays between taking pictures.
"Good macro performance...No white-balance bracketing
Limited software bundle...With a stylishly thin frame, a blend of beginner- and advanced-friendly features, and a couple of new interchangeable lenses to choose from, the Lumix DMC-GF1 looks like the best Micro Four-Thirds offering yet...But it's very pricey--and you must make compromises...It does this by locking up the mirror and displaying what the lens sees on the LCD......" read more »
Retrevo's Recommendation: Good Buy if you want high end