Well I can suggest the SN Virtual Airlines Group (http://www.svagroup.org/
), based on the SN Brussels Airlines and the former Sabena Airlines.
You don't have to bother about PIREPs, the logger program does it for you.
Realism level is very high, every pilot gets assignments, apart from them he's allowed to select some other flights of his choose.
A training department is also available.
Just take a look and see yourselves
[Edited 2003-01-27 12:57:59]
[Edited 2003-01-27 12:59:11]