The mount points on microATX (aka µATX, mATX or uATX) are a subset of those on an ATX motherboard and the I/O panel is identical, so it will fit in most ATX cases.
The µATX HTPC case I use is the nMedia HTPC-5000. It is a full height case, has room for a full ATX PSU and has 4 internal drive bays (plus one external for a DVD/Blue-ray drive).
The µATX HTPC case I use is the nMedia HTPC-5000. It is a full height case, has room for a full ATX PSU and has 4 internal drive bays (plus one external for a DVD/Blue-ray drive).