Yes, they usually ship right away. They'll tell you a ship date a week or 2 out, but then they'll ship it the next day.
Extended warranties are available, but that's one big advantage to the Latitudes - they come with a 3 year warranty standard, while the Vostro and Inspiron come with 1 year. They're all upgradable, though.
Go here to check on the features by model, including S-video.