#1
So....I am trying to find some scales, as well as chords in the open tunings of D and G. If anyone could help me I would greatly appreciate it.
#2
http://www.acousticfingerstyle.com/

over on the left side of the page... click on "Tunings Reference"
under that heading you'll see an option for "Open D Tutorial" as well as "Open G Tutorial"

there's really quite a bit to learn there. enjoy.
#3
Depends what you're trying to play. Blues in open G can be lovely, so just use Gm blues scale.

d-------------------------------------------------------3----5-----
b--------------------------------------------------3---------------
G----------------------------------3-----5---(6)------------------
D--------------------0--3----5-----------------------------------
G--0--3---5--(6)------------------------------------------------
D-----------------------------------------------------------------

G Bb C (Db) D F G