I LOVE IT. Free stuff, yeah! The best part, is they are actually VERY useful. Picasa is probably one of the BEST photo organizers I have ever used. It's rock solid stable, has a few simple photo touch up features, and you get 1GB of free photo storage on there website to share your photos. Check mine out at http://picasaweb.google.com/ryanlantzy
Google Earth is just cool and fun to play with. You can look at the roof of your house from a satellite view. It's sweet.
I use Google maps constantly on my phone to find nearby businesses like
Google Desktop Search is cool for several reasons. The one I like the most, is that it was the first tool I found that would search and index the contents of PDF files. I have several hundred PDF user manuals for different types of live sound gear on my laptop. I'm constantly having to find out how something works, and GDS was a godsend for me in that regard.
So, yay Google!