Yes, there are component and composite outputs for SD, as well as the RF output at broadcast or cable (QAM) output for SD.
ASFAIK, if you purchase your own HD STB, they no longer charge the old HD Enabling fee. You do not have to subscribe to an HD package.
However, if you plan to lease the HD STB (meaning they provide it to you at no charge or upgrade at a discount like the Dish'n it up), I do believe it requires a subscription to an HD package because that is how Dish gets its subsidy ($$ for their cost of providing the STB free of charge or as part of an upgrade) back.