Formula to lookup field in all children records

Well aren�t you lucky. If you read the release notes from the very recent December 16th release you will see that there is a new type of summary field called combine text. You can now summarize any text field in children up to the Parent to get a list of up to 25 Unique children.

The field will appear in a bubble format, but can be turned into a more text like appearance using a formula field ToText([my summary combine text field])