You're my first Dream Pal too, Kyle. And I have swapped berries with other people (I got a Persim berry, which is what I wanted to plant the most, but I'll have to wait until at least tomorrow before I can plant it). I haven't been able to water anyone's plants yet. Except my own, of course.

My details, for anyone who wants to become my Dream Pal:
Member ID: 10130678
Member Savedata ID: 2366492
World ID: 4