It would be useful to have a dependency configuration map to the active (or 'self') configuration.
For example, consider two projects A and B, with three configurations each 'ct' (compile-time), 'tt' (test-time) and 'rt' (run-time). Project B depends on project A in the same configuration, i.e.:
<dependency name="A" rev="latest.integration" conf="ct->ct;tt->tt;rt->rt"/>
If a configuration is added, this requires quite some maintenance, while it just says: in all configurations, map to 'self'. Suggested is to add a mapping *->@, meaning: in all configurations map to self.