Hi snarfisaga,

Do a search in this newsgroup on "sharepoint infopath integration". There I
explained how you can fill a textbox with values from a combobox when both
the combobox and textbox are in a repeating table. Basically, you need to use
a rule on the combobox to fill the textbox and use the current() function
while doing so.

To display the key in the combobox, just set both the value and display name
on the combobox to the key field from your table.

Hope this helps. If you still have problems getting it to work, let me know.

Regards,
S.Y.M. Wong-A-Ton