Have there been any studies into language development in the blind? The title pretty much says it all.  I'm looking for any studies or experiments into language development in those born blind.

I'm interested as part of my investigations into AI on how language is developed without visual cues and if language is impaired in anyway because of this and I've yet to come across any.  Has anyone heard of such an endeavor?
Yes, there have been a number of studies on language development in children with congenital profound visual impairment (PVI) over the years. Selma Fraiberg first described differences in early development, specifically later emergence of personal pronouns compared to typically sighted children [1].
More recent studies found that the vocabulary development of children with PVI follows a different trajectory. Vocabulary sizes is initially smaller compared to typically-sighted children, then develops rapidly and may surpass the vocabulary size of typically-sighted children of the same age [2]. Differences in the way that language is acquired in the early years, e.g. through shared gaze interaction with the caregiver, may part of the reason for the different developmental trajectories. 

This is only a very superficial treatment of this question. There are entire books on this topic that offer a detailed discussion of the research:

Perez-Pereira, M., &amp; Conti-Ramsden, G. (1999): Language development and social interaction in blind children. Hove, UK: Psychology Press/Taylor and Francis.

Pring (2004): Autism and blindness. Research and reflections. London: John Wiley &amp; Sons.

[1] Fraiberg (1968): "Parallel and divergent patterns in blind and sighted infants" The Psychoanalytic Study of the Child, Vol 23, 1968, 264-300.
[2] McConachie &amp; Moore (1994). "Early expressive language of severely visually impaired children" Developmental Medicine and Child Neurology, 36(3), 230–240.