The eugenia repanda (pitanga-jambo or ñangapiré negro) are ripening now, the last year I could try just 2 of them, but now half of the plants produced fruits (at different times, there are even some of them with flowers and fruits)... they should be black when ripe, but I tasted 2 red unripe ones and they were very good!!!, like a bing cherry (very different taste to e. uniflora -and I love unifloras- ).
The most interesting feature to me is that they can fruit in full shade.
If you like acid, small (1 to 1.5 cm) and/or myrtaceae fruits, you must have it :-D