Jetisfaction started scheduled services from Munster/Osnabruck to Zurich and Poznan last year with B1900s leased on an ACMI basis, but these were suspended after a short time. Both these routes are due to recommence on 5 September 2011 using Saab 340's supplied by Skytaxi of Poland on an ACMI basis, with the FMO-SEN route being added from 31 October.
The FMO-SEN-FMO route is bookable as a once-daily service, although departure times vary somewhat, departing 10:15 FMO on M W F, 06:25 Tu Sa and 18:45 Th Su. Presumably this is to fit in with the other route commitments. There's a 30 minute turnround scheduled at SEN each day and return fares start at 97.98 Euros inclusive. I assume the 31 October start date is to coincide with the closure of the Air Berlin FMO-STN service.
It's rather strange that although seats are bookable on Jetisfaction's website, there is no announcement there of this new route.