I think the concensus has been it will be a 1/4" line in, not mini. It will also have a mini in...
So by the translation, there's a mini line out jack AND a mini headphone jack in addition to the RCA outs and the S/PDIF I/O. Still no measurement on the TRS jacks but I have to assume they're 1/4 now that we know the jacks on the top of the unit are minis. Very cool that it'll ship with Audacity, and that it'll be Mac AND PC compatible, though hopefully the CF usage will make platform pointless...
Actually, look at the picture that shows the top of the unit. There are what looks like two 1/4" connectors and two 1/8" connectors. Going by the text on the first page of this thread:
The MicroTrack features a 1/4 jack input, a micro preamp (fantom powered), a jack output, digital in/out (S/PDIF), a RCA output and a headphones output. MicroTrack comes with Lithium ion battery. User can charge battery on a computer via USB port.
It looks like the 1/4" connectors are called "jacks" in that description. So there's the "1/4 jack input" and the "jack output". One of the 1/8" connectors is a headphone out according to the French article, but it makes no mention of what the other connector is. Maybe it's not even a 1/8" jack, but a power jack instead - the French article mentions the possibility of an external power source other than the USB. We still haven't seen the back or the right side of this thing so far, so maybe the power jack is there, but who knows...