Scott, in order to give you a meaningful answer to your question, you will have to be more specific. Until then, when a buyer makes an offer on a short sale it is more or less the same as a traditional sale except that the bank that holds the existing notes on the property makes ALL the decisions, NOT the seller. At first, the seller will either "accept", "counter" or reject your offer. But all final decisions are up to the bank.
Typically, this takes a very long time. Unlke a traditional sale, which usually close in 30 days or so. Short sales can take several months, some times a year or more.
If there is something specific that you were curious about, let me know.