You would indeed need to adjust your status once you are married. I believe the cost is around $1200 and it takes 3-6 months.
But go to
http://www.visajourney.com, more specifically this link:
http://www.visajourney.com/forums/index ... i130guide2The site is VERY detailed and takes you through the assembling of your adjustment package step by step.
You can also do a search on this forum. The understatement of the year is that this topic has been covered at length on canuckabroad.com lol
Good luck, being that you're in already in the US with valid status, it should be smooth enough a process
