I just tried out Nintex Workflow Online (Preview) for the first time, and I understand that this is a work-in-progess. The post for "I can't find the xxx action..." suggested posting requested actions that are not yet available to this forum. I use the following actions, some of them quite frequently, and would like to see them included in the Production release. Thanks!
Execute SQL
Query LDAP
Query XML
Web Request
Query List
Set Item Permissions
Action Set
Change State
Commit Pending Changes
For Each
Run If
State Machine
Switch
Build String
Collection Operation
End Workflow
Regular Expression
Wait for Item Update
Create Site Collection
Assign Flexi Task