Just want you to be aware of some general ToC concerns....
I assumed that the ToC will be based on a monthly publication date. But PLoS Biology’s current production schedule runs mid-month to mid-month. Biology could change production schedule to match other journals, but this calendar month ToC model would still not work for archival issues. This is also problem for other publishers (e.g. publish an issue every quarter).
Possible workaround is to browse by Volume/Issue and group articles by volume and issue instead of by publication date (this won't work well for PLoS ONE because of the large number of articles in every issue unless we can sort by article type and subject group). Possibly configurable by journal to either date and/or volume/issue.