A few years ago Stefan published list of his favorite Mac utilities. When I started to use the new MB Air last week I realized that my list is completely different:
Gmail
del.icio.us
Remember The Milk
Google Calendar
Plaxo
Google Reader
LinkedIn
Blogger
Facebook
Google Docs
Flickr
YouTube
Oh, I almost forgot to mention Firefox and Adium…
Roman Stanek's Push-Button Thinking 
maybe silly question, but why google calendar and also remember the milk?
Calendar and to-do list are different use cases. To-do items have a deadline and priority but unlike calendar events they are not fixed in time.
upsss… where is Microsoft? Google everywhere? 😉 What’s behind?
Hmm, looks like it shouldn’t matter to you, unlike to Stephan, what HW/local OS combination you use… except for its coolness, I guess 😉