Short term medical insurance generally include the following:

Simplified applications - more limited medical history questionnaires than permanent coverage
Faster Turn-around  -  effective dates can be as early as midnight following post or fax date if
   approved
Pre-existing conditions  -  most short term plans do not cover pre-existing conditions.  They are
   really built to handle more catastrophic issues.
Preventative is typically not covered on Short Term policies
Choice of deductible typically runs from $500 to $2000
Usually a minimum of 30 days is required and can be up to 6 months (sometimes month to month
   up to 12 months)
Short term plans are typically pre-payed for a fixed period of time

You can get an instant quote and benefit information Make sure to select "Short term" at the bottom of the page.