airberlin topbonus - How far in advance can one book AB?

Just planning a NYE trip MIA-BER today, but AB is only showing flights until 10/31/2012 on the website. Is this normal? If so how far in advance can one book flights on AB?

The farthest time one can book ahead is one year (on selected routes only, all of them intra-EU routes). For most routes, however, bookings are only possible until the end of the published flight schedule. AB divides its year in what they call 'summer flight timetable' and 'winter flight timetable', and seeing their summer 2012 schedule extends to Oct 31, this is the date until which you currently may book ahead. They usually publish their winter timetable sometime around the beginning of April, so you'd need to wait a few more weeks until that flight will become bookable.
This may well change with their OW integration, though.