isn't ongoing 28 supposed to get released tomorrow?
According to comiclist.com, the Star Trek Annual 2013 (a.k.a., the John Byrne photo comic) is available tomorrow. Next week, the new trade printing of Who Killed Captain Kirk? is released.
Looks like no new issue of Star Trek ongoing until at least Christmas Eve (so far).*
*I should note, however, that IDW frequently drops and/or adds titles to the shipping manifest with little notice, week to week. Star Trek #28 could very well be released next Wednesday, but it may not be confirmed until as late as next Monday.