Cisco Firewall :: ASA 8.3 NAT Overlapping Networks?

how to make NAT work for some future projects (remote offices with overlapping networks, L2L VPN with overlapping networks, etc). Using this as a guide [URL] I was able to get it to work using an ASA and a router (initial configuration below).  I'm able to ping from host1 to 40.40.40.2 (host 2) and it works, as does pinging from host 2 to 50.50.50.2 (host 1).  The issue I'm having now is that I've replaced that router with another ASA (second configuration below).  Once I've done that, I can no longer reach the end device with the NAT'd IP address. If I take out ASA1 and swap in a router (basically reversing the router/ASA in the initial configuration) it works fine as well.  I'm only seeing issues when using two ASAs.  I've verified that ICMP and telnet are permited inbound on the ASAs as well.  I even tried seperating the final host with another router (third configuration).

Initial configuration:
 
Host 1 --------------------------- Router -------------------------- ASA--------------------------- Router ---------------------- Host 2
30.30.30.2                    e0: 30.30.30.1                 in: 10.10.10.2               e1: 20.20.20.1             30.30.30.2
NAT: 50.50.50.2            e1: 10.10.10.1               out: 20.20.20.2               e0: 30.30.30.1             NAT: 40.40.40.2

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