Apache2 binary vanished during upgrade

[David]

I've just upgraded from hoary to breezy using the install CD, 
then apt-get update, then apt-get upgrade.

Apache2 binary has vanished without trace. 

When I do 
david at test:~ $ sudo /etc/init.d/apache2 start
nothing happens at all. 

david at test:~ $ sudo apache2ctl configtest
/usr/sbin/apache2ctl: line 88: /usr/sbin/apache2: No such file or directory

The last mention of apache in /var/log/dpkg.log says:

2005-12-10 22:24:56 status half-configured apache2-common 2.0.54-5ubuntu3
2005-12-10 22:24:56 status installed apache2-common 2.0.54-5ubuntu3

If anyone can tell me what happened to the apache2 binary, or where else I 
might have gone wrong, I would be most grateful. I don't want to completely 
re-install apache2 because I don't want to mess up the nice config that was 
working perfectly before the upgrade.

I'm also a bit worried what else might turn up missing, since this is the 
first thing that i tried :(