First of all, be aware that this enclosure is rather deep - 46 cm. To this add 4-5 cm to the plugs, especially the DVI for the video card and the AC cord. This is more than most standard racks..

The FLASH card reader

The build-in FLASH card reader is a standard USB-based one and it is plug-and-play under Linux.

The Optical Drive Bay

The 3" optical drive bay accepts all standard DVD etc drives as long as you can remove the existing slide front and the slide itself is not full width. There is a new slide cover included to match the case, and as it is attached with double-sided tape, it fits practically anything. The door opener button on the drive appears to be placed at a standard position and an extention button is on the case, pressing the original button on the drive. This works fine too. The 'busy' LED on the drive is however not visible, and the enclosure supplies no substitude (to be wired to the motherboard 'HD-LED') - so you will not be innoyed by that ;-)

Build-in Fans

The enclosure features four build-in fans which are all mounted to blow outwards. The PSU mount points are in such a way that a standard PSU will have its air intake from outside the enclosure, while the air outlet at the back out of the enclosure as usual - so it will not contribute the the internal airflow. The default fan speed - combined with the airflow direction out of the enclosure - results in a low but definately noticable noise. Depending on your setup, you may want to flip one or both the fans in the front end - so they in stead blow against the harddrive bay and the DVD bay respectively. And you may be able to control the fan speed, if your controller is working better than mine. As an alternative, I have further more installed four Zalman Fan-Mate II, which are quite easy to install and adjust, and which occasionally can be achieved quite cheap! So now the fans cannot be heared if anything is playing.
As I have flipped the harddrive bay fan and removed the bay completely (it uses PXE network boot), I have instead placed an air duct leading the incoming air stream to the video card (which is otherwise passively cooled). But generally the cabinet ventilation is excellent, and the heat is no problem.