IPKG Web isan installable package for the NSLU2 that can be installed through ipkg using the following command (as root)
ipkg install ipkg-web
This is a web front end for IPKG to make it easier to install new packages, upgrade packages and delete a package which you might have installed.
It makes it so much simpler to see exactly what packages you have installed with IPKG and to see what else is available!
Once installed, simply connect to: http://<ip address of slug>/Management/package.cgi and from there it is very straight forward!
Click the image to see it actual sized.