Here are some other threads from other sites about cases:
http://forums.msiwind.net/external-devices/perfect-size-slipcase-t54.html
http://forums.msiwind.net/external-devices/mind-bogglingly-good-case-reviewed-t2509.html (only for Austrailians it seems)
http://forums.msiwind.net/external-devices/alternative-storage-bag-t424.html
http://forum.eeeuser.com/viewtopic.php?id=750 (a lot are for the 7″)
Timbuk2 makes an awesome case for Dell for the Mini 9. They don’t have any current plans to release any bigger models for us 10″ folks. Someone stuck a MSI Wind in there and said it fit, but it was tight.