Managing hundreds of debian servers

Greetings list, I am curious what other sysadmins use to manage hundreds of debian servers, more specifically, how do you control the upgrade/installation of packages. I am familiar with cfengine, but we currently use debian packages to deploy all our current conf files. Some considerations woul

OT: recommendation for a USB SD memory card reader

Howdy debianistas,Does anyone have any recomendations on a good USB card reader? I am thinking about getting a Nikon D50 camera, and it uses SD memory cards. If anyone has any advice, good or bad, about which card reader I should get, that would be great. Additional input on experience with differe