Collier started crawling at 7 months, on my birthday as a matter of fact. Just a crawl here and there at first. His sleeping at 7 months, well, it's almost worse than when he was a newborn (every 2 hours). He is still our happiest little boy. He literally lights up anytime anyone looks his way.
He spent his seventh month in California, soaking up the sun and eating copious amounts of sand (I do not look forward to those sandy diapers). And near the end of his seventh month, he made his way back to his home (his REAL home, as Rilo calls it).