The Bamboo Lookup Selector is a custom lookup field that has (or: would have...) some nice features, like for example filtered selection.
The problem is that sometimes it doesn't work, because of many bugs in the implementation.
Anyway, for future reference, here are the bugs lists pages:
This week I had another problem with Bamboo Lookup Selector component.
The referenced item had a double pipe in the title (||), and this mad the child item not be able to reference it: during its saving, I got a (not meaningful) error.
The solution has been to rename the parent item.
Since SharePoint 2010, it is possible to customize the OOTB display form of a list item, to display the related items, i.e. the items that have a lookup field pointing to this item.
And in the end the customization is very simple: customizing the list (or content type) display form, it is possible to add the related list directly (and not a ListView web part). And it is possible to customize this list too, through a view, to customize columns to display, sorting and filtering (in addition to the filtering given by the connection to the main record).
A complete example showing this process is displayed in the blog post Showing Related List Items in List Display Form Sharepoint 2010.