Several other ideas for removing the item from your inbox while still being able to easily retrieve it.
I agree with Kelly that this should be a recurring, calendared task.
Create a separate e-mail folder for these items so that you can move them from your inbox.
Or, if you use GMail, create a label for "Pending Contact Info to Enter," and stash them there until you do the data entry.
Hope this helps.
"Not a natural at GTD"