Bit Tech visited Lian Li at Computex and noticed two unusual cases. The PC-90 for instance mounts its HDDs vertically along the right-hand side of the case, while the PC-100 has a back-to-front design whereby cold air is drawn in at the rear of the case and hot air exhausted out the front. You can check out pictures of both cases over here.
The PC-90, for example, mounts its hard disks vertically along the right-hand side of the case, a mechanism that when fully loaded with hard disks creates a bizarre looking wall of storage.
Lian Li claims that mounting the disks in such a way frees up room at the front of the case where the disks would classically be mounted. This allows Lian Li to either place more fans at the front of the case, or to shrink the size of the case.