While the iPod is great and I have a ton of music, sometimes I want to hear something new. Pandora is great for introducing me to relevant music that suits my eclectic tastes in music ranging from rap to alternative rock. The recommendations are spot on and their service is cross platform.
Keeping up with industry news is critical to my business. Google Reader is my feed reader of choice, but I'm not a fan of their mobile web app. Reeder gives me everything I would use in Google Reader from my desktop and more social sharing options. Plus, it's a beauty to look at.
When speaking at conferences I tend to take a ton of photos right from my iPhone. I hate to leave them all on my iPhone and I like to share them with other attendees too. So FlickIt is my app of choice to get those pictures up on Flickr.
I like to reminisce about the many cities I've traveled to and the places I've visited within those cities. Foursquare is a neat app for me to track my travels and also pick up some cool badges along the way.
I'd get lost in all the cities I visit if it weren't for the Google Maps iPhone App. It also doubles as my GPS navigation system in my friend's cars (I don't own one yet). I use public transit in Atlanta and Google Maps provides up-to-date info on bus schedules, times, routes and more. I can plan just about any trip in 3 different ways with this app: driving, public transit, and walking.