thanks for the link chris!
Dean Lister used the Leg hook, with elbow strikes to finish sakara with a triangle at UFC 60 you can see him teaching the same technique in the gifs when the opponent grabs your leg. he also used it to hit an omoplata on Okami but it was escaped. dean also uses it often in comps.
you can see a similar technique here:
http://www.purefight.org/video/19766...William-Spicer where instead it is finished with an armbar.
this is not a great angle or quality but it is choke described after the references
http://www.youtube.com/watch?v=XSFMUq0qiS4
both Estima's use it often, notable examples are joao assis vs victor estima at adcc 2011, where victor uses it to get an omoplata which he sweeps with. Braulio uses it to lock an omoplata on James Brasco at adcc 2009, which james escapes.
this style of guard has also been used in competition by nino schembri, Guilherme Mendes, clark gracie, kyra gracie, rodger gracie and shawn williams. im sure there is more too!