Honestly, I had a hard time trying to achieve that effect (faded/blurry background with only one subject focused sharply), using the lens (canon 18-200mm IS) that I have right now on the dslr. I had to squint and re-focus a lot since it was difficult, plus the fact that we were in a hurry and the wind was getting to be a nuisance. Well, I believe that the lens weren't supposed to be used that way, really. lol.
Still, it is fun to experiment and see how far your gadgets can go! Would you believe I only managed to get one decent shot and this was it? LOL. If I continue doing that I know I'll be needing those eye wrinkle cream sooner than I expected! ;P