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Real time performance diagnotics for linux?

Sometimes machines will be performing poorly (especially with interactive sessions), and you want to figure out what’s wrong. The general bottlenecks are:
Disk
Network
CPU
Interrupts
FreeBSD has some pretty decent utilities that will let you get some basic information quickly, so you at least know where to start looking for problems.
For instance, for disk stuff you can use [...]

Component video out for MythTV (in 16×9 glory)

For a while I had s-video working fine with my new TV (JVC HD-52Z575), but I was using the stretch feature on the TV to make the 800×600 into a 16×9 resolution, and the stretched out people were starting to get to me, so I decided I was going to figure out how to get [...]