http://buffalo.jp/product/hdd/network/ls-qvl_r5/
Currently using two LS-QV4.0TL/R5
Firmware update (JP) 2009: http://buffalo.jp/download/driver/hd/ls-ql.html
USA site: http://www.buffalotech.com/support/downloads/linkstation-pro-quad-ls-qvlr5/
2011 June Updates:
Firmware: http://www.buffalotech.com/support/getfile/ls_series-142.zip
NAS Navigator for Windows: http://www.buffalotech.com/support/validate/?MTkzfG5hc25hdmktMjM0d3Iuemlw
ReadMe: http://www.buffalotech.com/support/getfile/nasnavigatorver.2.34_windlswr_.txt