For the daring, I got snac running on Lucid Lynx using the following method:

1) Install all the dependencies you can
2) Install libdb4.6 (it'll be a dependency later)
   > sudo apt-get install libdb4.6
3) Grab and install some older packages (from Karmic Koala)
   > wget "http://mirrors.kernel.org/ubuntu/pool/universe/b/boost/libboost-filesystem1.34.1_1.34.1-16ubuntu1_i386.deb"
   > wget "http://mirrors.kernel.org/ubuntu/pool/universe/b/boost/libboost-serialization1.34.1_1.34.1-16ubuntu1_i386.deb"
   > wget "http://mirrors.kernel.org/ubuntu/pool/universe/b/boost/libboost-test1.34.1_1.34.1-16ubuntu1_i386.deb"
   > wget "http://security.ubuntu.com/ubuntu/pool/main/p/python2.5/python2.5_2.5.4-1ubuntu6.1_i386.deb"
   > wget "http://security.ubuntu.com/ubuntu/pool/main/p/python2.5/python2.5-minimal_2.5.4-1ubuntu6.1_i386.deb"
   > sudo dpkg -i libboost-filesystem1.34.1_1.34.1-16ubuntu1_i386.deb 
   > sudo dpkg -i libboost-serialization1.34.1_1.34.1-16ubuntu1_i386.deb 
   > sudo dpkg -i libboost-test1.34.1_1.34.1-16ubuntu1_i386.deb 
   > sudo dpkg -i python2.5-minimal_2.5.4-1ubuntu6.1_i386.deb 
   > sudo dpkg -i python2.5_2.5.4-1ubuntu6.1_i386.deb 
4) Install equivs so that we can create fake packages to satisfy the rest of the requirements
   > sudo apt-get install equivs
5) Create some equivs control files
   a) > cat > libboost-filesystem.ctl <<EOF
      > Section: libs
      > Package: libboost-filesystem
      > Version: 1.34.1
      > Provides: libboost-filesystem
      > Description: Satisfies snac install requirements
      > EOF
   b) > cat > libboost-serialization.ctl <<EOF
      > Section: libs
      > Package: libboost-serialization
      > Version: 1.34.1
      > Provides: libboost-serialization
      > Description: Satisfies snac install requirements
      > EOF
   c) > cat > libboost-test.ctl <<EOF
      > Section: libs
      > Package: libboost-test
      > Version: 1.34.1
      > Provides: libboost-test
      > Description: Satisfies snac install requirements
      > EOF
6) Build and install equiv packages
   > equivs-build libboost-filesystem.ctl 
   > equivs-build libboost-serialization.ctl 
   > equivs-build libboost-test.ctl 
   > sudo dpkg -i libboost-filesystem_1.34.1_all.deb 
   > sudo dpkg -i libboost-serialization_1.34.1_all.deb 
   > sudo dpkg -i libboost-test_1.34.1_all.deb 
7) Install nox/snac packages
   > sudo dpkg -i openflow-common_0.8.9-rev4_i386.deb 
   > sudo dpkg -i openflow-pki_0.8.9-rev4_all.deb 
   > sudo dpkg -i noxcore_0.4.0~beta_i386.deb 
   etc.
8) Build Twisted for Python 2.5 (easier than using old package)
   > wget "http://tmrc.mit.edu/mirror/twisted/Twisted/8.2/Twisted-8.2.0.tar.bz2"
   > tar jxf Twisted-8.2.0.tar.bz2
   > cd Twisted-8.2.0/
   > sudo python2.5 setup.py install
9) Install zope.interface for Python 2.5
   > wget "http://www.zope.org/Products/ZopeInterface/3.3.0/zope.interface-3.3.0.tar.gz"
   > tar zxf zope.interface-3.3.0.tar.gz 
   > cd zope.interface-3.3.0/
   > sudo python2.5 setup.py install
10) Run nox
   > cd /opt/nox/bin
   > ./nox_core