yahoo_collage.pl --query flowers
You can specify the file which the collage should be written to by using the
--filecommand-line option. For example: the following invocation of the script will query Yahoo for pictures of geeks and will write the collage to a file named geek.html.
yahoo_collage.pl --query geek --file geek.html
You can simply open geek.html in a Web Browser like Mozilla Firefox and view your collage later on.
You can download the source of the Perl script from here. I offer no guarantees, so if it breaks, you get to keep both pieces :-)
Update on March 03, 2005: I hacked the above script and generated a wallpaper after querying Yahoo Image Web Service on a set of keywords.
Check it out!