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A few tips how to prepare photos for a web photo album:

1. Make a copy of the picture that you would like to have on web. The following steps include instructions that will irreversibly change your photos.
2. Rotate them correctly. A lot of cameras writes an information about the rotation into the header of a image file (one of the EXIF values). Unfortunately not all web albums can recognise this information correctly.
   Install the jhead application and type this:
   Bash [Show Styled Code]:

   jhead -autorot photo.jpg
   

   Bash [Show Plain Code]:

   1. jhead -autorot photo.jpg
3. Remove unnecessary data. My Canon camera saves also a thumbnail of the photo into the image file, that is cca 10kB. It is completely useless for a web album (it will create its own thumbnails anyway).
   It is easy to remove it with the jhead application:
   Bash [Show Styled Code]:

   jhead -dt photo.jpg
   

   Bash [Show Plain Code]:

   1. jhead -dt photo.jpg

   Of course, the first and the second step can be done together for all your pictures:

   Bash [Show Styled Code]:

   jhead -dt -autorot *
   

   Bash [Show Plain Code]:

   1. jhead -dt -autorot *
4. Reduce the resolution. If you do not need to publish your photos in the full resolution (no, you do not need, indeed ;), it is a good idea to reduce the resolution to save visitor’s time and bandwidth.
   I like the mogrify application from the ImageMagick package. The following line reduces the resolution to 1024×768 and reduces the JPEG quality to 70%:
   Bash [Show Styled Code]:

   mogrify -resize 1024x768 -quality 70 *
   

   Bash [Show Plain Code]:

   1.  

   Do not worry about rotated photos, mogrify will handle them correctly.

Well, your photos (as image files) are ready for your web album :)

P.S.
For the SimpleViewer Flash album viewer I make a copy of image files to the thumbs directory and use the following command to make thumbnails:

mogrify -resize 65x65 *