lOn Southwest/Ryanair/easyJet/BMIBaby etc. etc. no you are NOT
" PLEASANTLY booked on the next available", if the miss the check-in cut off (Which has only recently been put back to 30 mins from 40) you are "PLEASENTLY" refered to the ticket desk where you pay FULL FARE for the next available flight and recieve no refund for the one you missed.
Complain to easy, and you might recieve a consiliatory letter. Cpmplain to Ryanair and you WILL be told to F%^& OFF!