photos from Picasa on your website
Google has a photo storage and sharing service called Picasa. You can upload a large number of images to it for free, and share those images with anyone you want.
One of its features is to create a sideshow with an album. Example here.
Another way of displaying them would be to embed the slideshow into your website like this -
So, how’d I do that? Easy…
Sign in to (or sign up for) your Google Account for Picasa Web Albums at http://picasaweb.google.com using your Google Account username and password.
Upload some images.
Click the My Photos link and select the album you’d like to make a slideshow.
Click Link to this album on the right panel.
A new Embed Slideshow option should appear. Clicking this option creates the code for a Flash slideshow from the album you’ve selected. When you update this album, your slideshow is automatically updated to show the latest photos. You can select from five photo sizes for your slideshow (up to 800 pixels) and you can also edit the resulting code for more flexibility.
To embed the slideshow, copy and paste the HTML code that’s shown into your blog or webpage.