variable column widths

Hi No Notes:

are there any plans to add variable-width text frame columns any time soon?

We are users like you who have been vetted by Adobe to help others with their workflow issues. Unless we are on the beta (and if we are, we are under NDA and are not allowed to discuss it) we don't have more information about what is coming than you do. If you want to file a feature request, you can do so here: https://indesign.uservoice.com/

There are three ways to approach this layout as of today and in the foreseeable future:

• 2 threaded frames of specific sizes as per @Scott Falkner 
• 1 frame with three columns and span settings as per @Eugene Tyson 
• Put the content in a table as per @Eugene Tyson, which may be what you did but you have the visual aids hidden so we can't tell. If this is a multi-page story and not just a short blurb, working inside a table can be awkward and limiting, but we can't tell that from the screen shot either.

I will say I am confused about the "it HAS to be 2/3 and 1/3 precisely" because it doesn't seem like it is. The first column is more than twice the width of the second column.

~Barb

You can adjust the Columns created by the Margin settings

View>Grids & Guides>Lock Column Guides

Then you can DRAG your column margins

Not within a single text frame. Columns in a text frame are always of uniform width. What you can do is setup column guides in Layout > Margins and Columns, then drag the column guides wherever you like (this can be done on an individual page or a parent page).