Over the past several months one of the resources I've use most frequently in Christo van der Merwe's Biblical Hebrew Reference Grammar. Van der Merwe is a baller. He writes clearly and offers dependable, well-informed judgments time after time. The grammar is very well organized, so it takes just a moment to click through the table of contents to find an answer to a question. If you have a question about Hebrew grammar, this is the first place you should turn.
Just thought some of you might have this resource and not know it is there (and/or not know how great it is).
A beer
and a beach
for Van der Merwe!
[A bit of a side note: the print edition is actually published by Sheffield Academic and is a part of their Biblical Languages series (same series as Porter's intermediate Greek grammar)]