how to find similar sentences / phrases in R?

Example, I have billions of short phrases, and I want to clusters of them that are similar.

> strings.to.cluster <- c("Best Toyota dealer in bay area. Drive out with a new car today",
                        "Largest Selection of Furniture. Stock updated everyday" , 
                        " Unique selection of Handcrafted Jewelry",
                        "Free Shipping for orders above $60. Offer Expires soon",
                        "XXXX is where smart men buy anniversary gifts",
                        "2012 Camrys on Sale. 0% APR for select customers",
                        "Closing Sale on office desks. All Items must go" 
                         )

assume that this vector is hundreds of thousands of rows. Is there a package in R to cluster these phrases by meaning? or could someone suggest a way to rank "similar" phrases by meaning to a given phrase.