Once apon a time they were hard to get, now there are more than 280,000 available at ISnoop.net at their Gmail invite spooler. I gave away a few a long time ago when they were still semi-scarce. It's cool to see that they have given away more than 300,000 so far.
Update, 24 March
They now have 591,460 invites available, with 605,389 shared so far. That's like double a month ago. Very impressive.
Feb '04
Oops I dropped by satellite.
New Jets create excitement in the air.
The audience is not listening.
Mar '04
Neat chemicals you don't want to mess with.
The Lack of Practise Effect
Apr '04
Scramjets take to the air
Doing dangerous things in the fire.
The Real Way to get a job
May '04
Checking out cool tools (with the kids)
A master geek (Ink Tank flashback)
How to play with your kids