the Sheevaplug, Guruplug, and Dreamplug are what really got me into embedded computing and linux. I still have my Sheevaplug in storage, and a Dreamplug in service as my internal DNS server. the Marvell Kirkwood SoCs they were based on were quite long lived, eventually being rebranded as lower-end Armada chipsets.
P.S. if anyone wants to tinker with that ecosystem, there's still quite a number of people dedicated to packaging up Debian for them, and if you're okay with some soldering to get UART access, you can get a brand new $18 Dell Kace M300 to try out. in a lot of ways, I still prefer them to any newer single-board computers, despite my pretty significant collection at this point.
P.S. if anyone wants to tinker with that ecosystem, there's still quite a number of people dedicated to packaging up Debian for them, and if you're okay with some soldering to get UART access, you can get a brand new $18 Dell Kace M300 to try out. in a lot of ways, I still prefer them to any newer single-board computers, despite my pretty significant collection at this point.