In Stargate SG-1 S10E6 "200", during the puppet bit, there is a quick shot with Walter typing on a computer by wiggling his puppet hands over the keyboard. If you pause and look at the keyboard, a bunch of the keys spell out "ALEX SUCKS DICKS".

This is likely an inside joke at the expense of the writer and script coordinator Alex Levine. Or perhaps they were actually advertising their own services.