We have created a custom field named "Product" which is of type "Products Field". In our Jira 2.0 integration, we want to map this field to a Jira field called "Component/s". We can see "Component/s" on the Jira side but the "Product" field is not there to choose from. We understand that this is not currently a field type which is supported, but we feel that since we have equivalent values defined for both the "Products" field on the Aha! side and also on the Component/s" field on the Jira side that they should align with one another and sync.
The status of this idea was out of date. It is now possible to map custom fields between any supported field type. You can find more details here.
This is of interest to us too - we want to map the product name via a custom field to a JIRA custom field