Ahhh...I found this during a google and was lead to the page via links to the first two models on the list. Those two are indeed newer, with the Seritek listed as a Q1 2006 release. I did check the date on those just to make sure I didn't find some forgotten page showing products long gone (or only compatible with beige G3's 😀 ).
Indeed, a nice setup for backup or, with the four-bay in particular, a compact RAID (beyond RAID 0) with room for parity and a replacement drive all in one rack.
(Like those network drives too...thread 'jacker 😉 )