The picture of the Kelownan capital city on Jonas' home planet is actually that of Vancouver, with some extra buildings added.
Daniel asks Jack if they get paid for the work they do. The answer is, of course, yes. Jack and Carter would receive military pay and whatever extras they are entitled to such as combat pay, hazard pay, etc. Daniel, Jonas and Teal'c would be military contractors so could negotiate whatever reasonable terms and compensation they wanted like healthcare, food, quarters and pay.
Actress Glynis Davies who plays Ambassador Noor, played young Catherine Langford in S2E21 "1969" and will go onto play yet another character in Stargate: Universe.
Amanda Tapping (Samantha Carter) later appeared in an episode of Sanctuary (2008) with the same title: Homecoming (2011).