Move to eclipse Indigo?

Now that the new version of eclipse is out should I move to immediately? If my plug-ins work in Galileo will it work in the indigo?

There is no way to know without trying or researching what the particular plugin providers state regarding Indigo compatibility. Many plugins will work just fine. Some will not.

I would recommend starting a separate Indigo install along side your working Galileo install. Then install your plugins into the new install one by one. If everything installs and appears to be working, you can safely transition. If it doesn't, you will know which plugins are incompatible. Maybe a newer version exists or is on the way.