There is nothing for moving from another system to the SA ecosystem; however some things to keep in mind could be the following (I personally have not seen any other system, but am guessing there are things similar between the SA & other systems):
IPs for the system
groups/rules for role mapping
bookmarks/access provided through non-L3 VPN options
IPs used for VPN tunneling/L3 VPNs
rewriting rules (if applicable)
any special actions needed for the rewrite equivalent to work (for example if a custom web app needed special rewrite items, pay special attention when making the move to the SA)
