Gary Lapointe has written and provided some very useful STSADM extensions:http://stsadm.blogspot.com/2007/08/stsadm-commands_09.html.You can download them (and the install instructions) from here: http://www.thelapointes.com/blog/stsadm.zip

A very useful one is the import/export list: http://stsadm.blogspot.com/2007/09/importexportcopy-lists.html

Enjoy,

Dan