I have looked at a lot of tatting blogs over the years.  They all have their interest, but many of them seem to fade over time.  I found Lilas's blog yesterday.  She does write tatting books and sells patterns.  But even if you aren't interested in the commercial part, the blog is well worth looking at.  (Okay, so I admire anyone who decides to tat with sewing thread.)  You can find her blog at http://lilas-lace.fr/ .  It is both in English and French.