Here are _working_ examples pulled from my testbeds for algo-0.8.0 
(freeswan algo patch: AES, twofish, blowfish ... etc).

They are focused on testing the new freeswan algorithms between these IPSec
implementations.

I tried to put all related config files (except FSW ipsec.secrets, partly
because I'm too lazy too obfuscate it).

The players are: freeswan-1.98b (FSW) + algo-0.8.x, openbsd-3.0 (OBSD),
freebsd-4.5 (FBSD) and SSH Sentinel-1.3.x.

                        :
A B C D                 |   192.168.2.20              10.1.20.0/24
+ + + +                 +----------------[ FSW uml2 ]==============
: : : :                 |
: : : :                 |   192.168.2.18              10.1.18.0/24
+ : : :                 +----------------[ FSW uml1 ]==============
  : : :                 |                                         
  : : :                 |   192.168.2.13              10.1.13.0/24
  + : :                 +----------------[ OBSD     ]==============
    : :                 |
    : :                 |   192.168.2.23              10.1.23.0/24
    + :                 +----------------[ FBSD     ]==============
      :                 |
      :                 |   192.168.2.61
      +                 +----------------[ SSH Sent.]
                        :

IPSec links:
  A) ./freeswan-freeswan/   (uml1-uml2)
  B) ./freeswan-openbsd/    (uml2-obsd)
  C) ./freeswan-freebsd/    (uml2-fbsd)
  D) ./freeswan-ssh/        (uml2-ssh)

Please don't bomb me with "Can't make freeswan talk to XXXXX", hope these
configs help you a lot.

Happy hacking =)

--Juanjo