Mp3 players
Digital cameras
major progress in Mobile phone technology
Broadband
YouTube
Wikipedia
file sharing takes off
Finding water on mars
Finding a cure for the HIV virus (sort of)
Lost a planet, got a couple new ones.

not my cup of tea, but gotta hand it to them:
World of Warcraft - 11 million subscribers
The Sims franchise - 100 million copies sold
Harry Potter series

and two things I appreciate:
People starting to wear non-ugly clothes and getting decent haircuts
Quality boost in TV-shows

last two points may be ended with an imho