Don, Thank you!
I just learned something; I never realized that option worked that easily and I've been using Picasa for over three years!
Here's what Don's talking about:
Note: This option is on the Picasa
Website, where your photo albums live, and NOT the Picasa software (Rick is right the software sucks).
And, if you want you can still further tweek the scaling to whatever size you want by simply changing this part of the link/IMG code (in red):
[lMG]https://lh4.googleusercontent.com/-kezzhKZmM2c/Tj9KTGy0AQI/AAAAAAAABZM/xl9UdCVjFNQ/
s800/SomePhoto.JPG[/lMG]
/s800/ = 800 pixels maximum
/s640/ = 640 pixels maximum
/s500/ = 500 pixels maximum
...and so on.
Thanks Don!