We used to use the old Google Sites for our ePortfolios, but, even with the current limitations, will now use the new Google Sites for our ePortfolios.
Each student shares their ePortfolio with me as an editor, so I can edit their site if necessary, or when the feature gets added, to add comments to their site.
For students that have taken classes with me before, they create a menu for each class with their assignments as sub-menus below them. For students in one of my classes only, their main menu is their list of assignments for that class.