Dukascopy has two separate businesses.
One is as broker/market maker (www.dukascopy.com).
The other is research & software development (www.dukascopy.net).
Unil last year, the reaserch division also operated as a market maker, but with small accounts (only 500USD required to open).
I had one of these accouts until they closed the shop and moved all trading related services to www.dukascopy.com.. I decided not to trade with them anymore since the amount required to open an interbank account is 50000USD (and really this is the interesting part of their offer since a normal account can be get from any other market maker).
See the following thread in the forum for more info: