Really like your reftagger plugin and use it on our website forums, which is aimed at young teens.
I like that it doesn't throw up false positives like some other plug-ins I've tried, however because of this there seems to be a few false negatives, which the following little tweak will mostly fix....
Could you please add to your regular expression so that it will accept "v" or "vs" or "vv" as the verse separator, e.g. "1 Peter 5v7" - verses are commonly written in this fashion in our forums 
If you can support spaces there too that would be great ("Deuteronomy 18
v 14-20" or "Deut 34 v6"), although I realize this might produce more
false positives and I would be happy if just the first suggestion was implemented.
Thanks for your help and ministry!