Had to add an extra rule to make this work for continuation pages of the front page:
“^/page/([0-9]+)/?$” => “/?page=$1”,
There appears to be an issue still, within BBpress 1.02 this time: when on a continuation page, the link for “Page 1” does not include a “1” but the number of the current page – so the link does nothing and does not return to the home page.