Is there a site which has lists of anime/manga/novels and has up-to-date information on release dates?
Baka Updates (for anime) and MangaUpdates (for manga) constantly update with newly subbed and translated series.

For a chart of all anime releases by season, check out The Cart Driver.

And last but not least, to keep track of all the series you have viewed, use My Anime List.

This answers the question in your title, however I don't know of any site that particularly keeps track of only English releases. Myanimelist does have the info on English series though, as it will tell you all the voice actors (Japanese, English, etc). This site is probably your best bet for all the information you would want from a series and it definitely has more than wiki and Anime News Network.

For your situation, however, there are currently no manga released as well as no English light novels. The only light novels that exist are in Japanese. Baka Tsuki was looking into translating it, but nothing has been done yet.

I should probably also add that light novels in general are usually not published into an English version. Translators like BakaTsuki will normally take on those projects and if they do translate the series, it is normally posted in the serie's respective wikia.