Tell me is there some sort of web interface for Debian 6.0 (Squeeze) or how served nas.
Not sure what you are asking...
The Buffalo Linkstation Mini provides a web interface using a customized system designed by Buffalo. When you convert the device to Debian 6.0, it removes Buffalo's system, so there is no more web interface. The installation instructions explain how to connect to and administer the device after the conversion is complete.
If you are looking to use the device as a DLNA media server, then take a look at the mediatomb package... http://packages.debian.org/search?suite=squeeze&searchon=names&keywords=mediatomb%20mediatomb
. If you are looking to use a web interface to manage your device, then take a look at the webmin package... http://www.webmin.com/deb.html
There are over 29,000 packages available for the Debian platform... http://packages.debian.org/squeeze/
With some effort, you can configure your device as a fully-functional Debian server. For example, I use my device as a mail host (using the postfix and dovecot packages), a web server (using the apache2 package), a DLNA media server (using the mediatomb package), a file server (using the samba package), dynamic dns (using the ddclient package), security (using the denyhosts and fail2ban packages), time synchronization (using the ntpd package), and an FTP server (using the vsftp package).