apache2 - After 12.04 Upgrade - /var/www is missing

I just upgraded from ~10.10 (it was stuck, un-upgradeable) to 12.04 by installing over the top of the existing installation.

The home folder and desktop files all seem to still be present, as expected, but the /var/www directory is gone!

A file system search doesn't turn anything up, looking for "www".

Apache doesn't seem to be installed anymore either.

Does the installer really delete the entire folder?

Output of fdisk -l:

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors

Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00032a24

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *          63   964622924   482311431   83  Linux
/dev/sda2       964622925   976768064     6072570    5  Extended
/dev/sda5       964622988   976768064     6072538+  82  Linux swap / Solaris


Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x34e85825

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1              63  1953520064   976760001   fd  Linux raid autodetect


Disk /dev/sdg: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0b366f5b

   Device Boot      Start         End      Blocks   Id  System
/dev/sdg1              63  1953520064   976760001   fd  Linux raid autodetect

Output of df -h: (temporarily mounted in the 12.04 live cd)

Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       457G   77G  358G  18% /media/500GB

Using some of the file system tools (debugfs, extundelete, ext2grep) I can see the deleted www directory. However, it looks like that deletion combined with the operating system upgrade ruined any chances of recovering the directory.

Sure, installing over an existing installation will preserve your home folder and settings, but everything outside it will be wiped out and installed anew. That's the difference between installation and upgrade. After install you'll have a default set of applications with default settings, that's why Apache is not installed.

In fact, even preserving the home folder is a relatively new feature of Ubuntu installer...