Notice - as of May 17, 2007 Picasa Web Albums now offers their own easy to use flash embedded slideshow, effectively making this one obsolete.
Picasa Web Albums Now with Slideshows.
Everything here still works, but the native flash presentation from Picasa Web Albums is slicker and probably what you want to use if you want a slideshow.
Instructions on use and comments at the blog post New
Blogger Widget for Picasa Web Albums
To use the widget format, you MUST be using New Blogger and a Layouts
compatible template. If not, you can copy and paste the generated source for any webpage that can use javascript.
Enter in your Picasa Web Albums Username and then click Submit
Go to http://picasaweb.google.com and sign in to see your albums. Click on SETTINGS in the UPPER RIGHT of the page and
then scroll down to your Gallery URL. This is usually your google account username, but can be changed in your Picasa Web Albums settings. Your current gallery url will be in the format
http://picasaweb.google.com/USERNAME Note - if you change your username in the future, you will have to remake any widgets.
Display the Widgets Title
Show as
SlideShow
Vertical Strip
Horizontal Strip
Show Album Title as Header
Show Border
Around Image
Slide Show
Speed in Seconds(10 max)
Number
of Images to Display (20 max)
Size of Thumbnails
# Border
Color (in Hex)
Widget Maker Updates
May 14, 2007 - Revamp. Added vertical-horizontal options when not in slideshow mode
Numerous CSS styling tweaks - Removed PWA logo option -Changed setup from manual to automatic by retrieving feeds for the username
Slideshow given fade out-in transition effect
Mar 22, 2007 - JSON feed format at Picasa Web Albums changed, updated
the widget maker to work
with the new format. Widgets made before this date will need
to be remade/installed. Fixed a few typos,
rewrote info urls to the correct blog post, changed posting url from
beta.blogger.com to www2.blogger.com as the beta address seemed to
cause some issues. Also tweaked a few minor styling settings to work
better with some of the standard Blogger template setups. Added smaller
image size options.