Fully encrypted MacBook Air isn't booting any more

Question

This topic is NOT in the wrong category.
I think it's a problem related to OS X Lion (10.7.4) and a file system encryption with File Vault 2.
I've got a new/fresh MacBook Air 13" a few days ago and configured the system to suit my preferences.
There are only a few Apps installed: Java, Eclipse Java EE, TeX, Flash and Steam.
The system worked fine and is fully encrypted with File Vault 2.
This day I was starting the MacBook Air but couldn't log into the system with any user.
The Icon called "the see me rollin, they hatin'." appeared for a long time and suddently the Apple Logo was replaced by a "forbidden" logo.
I'm new to OS X but I've got very good skills in working with Linux escpecially with Uubuntu Linux and system encryption using LUKS.
After searching for a while I've found out, that many people have had problems with PGP, because it has done something harmful to prevent the system from booting normaly. Since I didn't install any PGP software, that I'm aware of, the fixes provided in many forums don't apply here.
So I restarted the system and pressed cmd+r to enter the recovery mode.
I've checked my disk and found this out that disk0s2 is failing by typing "diskutil cs list":
+--Logical Volume Group SO-ME-HA-SH
    Name: Macintosh HD
     Sequence: 1
     Free Space: 0B
     |
     +-< Physical Volume SOME-OTHER-HASH
           Index: 0
           Disk: disk0s2
           Status: Failed
           Size: 120GB
After typing "disk info disk0s2" I've got this:
Partition Type: Apple_CoreStorage
Protocol: SATA
SMART Status: Verified
So it seems the physical disk is still alive.
Then I tried the fsck_cs on disk0s2 and this was printed:
** Load and verify Transaction Segment
** Incorporate 1 newer non-checkpoint transactions
** Load and verifiy SOME-CRYPTIC-HASH
    Unable to bootstrap transaction group 932: invalid field value
Invalidate transaction group? (entering y here)
... Additional two identical questions, which I always answer with y ...
** Load and verify Logical Volumes B-Trees
    Unable to bootstrap transaction group 927: incorrect block type
    No valid commit checkpoint found
** The volume HASH-OF-THE-VOLUME-GROUP was found corrupt and can not be repaired.
I tried the same command but this time answering with n, but it didn't helped.
All log files where shorted to support readability.
What can I do next?

Answer 1

According to the manual page on the OS X Developer Library, fsck_cs has a bug:
fsck_cs does not perform an exhaustive validation, nor is it able to fix many of the inconsistencies that it does detect.
Somehow my MacBook Air didn't complete some I/O transactions to the SSD and therefore the physical volume of the core storage has "failed". Fixing inconsistencies didn't worked because of the bug mentioned above. Repartitioning disk0s2 and reinstalling the OS solved the problem.
@Link Davis: The SSD has not failed, if so the SMART status would have shown that. That's the most shared oppinion on many Apple related forums. I think you mean the disk, not the drive.
I'll not encrypt the SSD of the MacBook Air with the FileVault 2 until the bug is going to be fixed!