This workflow is now part of the FIM 2010 Granfeldt Workflow Activity Library
UPDATE: Just updated this to support other target attribute types than strings. Get the latest version. Also, you can use my PowerShell script instead of GACUTIL to put assemblies in the cache.
I'm pleased to announce that my custom workflow for looking value in the FIM portal has now been tested and released for public use.
I find this workflow interesting because you often have to populate values on users based on some other attribute. This workflow has many interesting features, i.e. you could lookup a OU for the user based on the department and have the list of OU's be maintained in the FIM Portal it self - or as the example shows below, you could have a list of "pretty names" for your cost centers and populate the CostCenter attribute based on a CostCenterId flowed from i.e. the HR system.
Parameters are -
XPathFilter: The Lookup filter for getting the value, i.e. /Person[starts-with(AccountName, 'D')]; if your query returns more than one result, the value from the first result will be used
Attribute Name: The name of the attribute that you want to get the value from (for now only single-value attributes is supported (and tested); go ahead and try with multi values if you dare...
Destination: This is where you want to put the found/extracted value (workflow has been tested with target attributes of string and numbers).
You should note that the look up is done as the Built-in Synchronization Account (so make sure that that guy can read the objects in question (in the XPath filter) and the update of the target attribute is done as the requester, so again make sure that the correct permissions are present there. Future version may include options to specify context.
To add the workflow to the portal, you'll need this information about the Activity information configuration
Display name: Lookup Attribute Value
Activity Name: Inceptio.FIM.Activities.LookupAttributeValueActivity
Description: Using XPath query looks up value in FIM
Assembly Name: Inceptio.FIM.Activities, Version=188.8.131.52, Culture=neutral, PublicKeyToken=fbba0d5fa1bd8867
Authentication, Action, Authorization: <anyone>
Type Name: Inceptio.FIM.Activities.WebUIs.LookupAttributeValueActivitySettingsPart
So how do I get the software? There are two .DLL's to put in your GAC and they can be downloaded here. Please let me know, if you have any problems with the workflow or any feature request.