Citizenship after greencard through wife

[immihelp]

Hi. I have few questions for my eligibility of Citizenship. Below is my profile and questions.

Background:
I am married to US Citizen since Apr' 2004 (marriage registered in India, not registered in US)
We lived in india for 6 months and both landed together in US in Oct 2004 (within 6 months)
I got my permanent GC in Apr 2007 (removed the conditions from my GC)
We dont have any kids as of yet and are not planning to have any in near future
Our marriage was purely on the good faith and did not intend to come to US with the help of marriage


Questions:
Can I apply for US Citizenship now (as of Oct 06, 2008)?
If YES, Do I need my Wife's consent or signature in my citizenship application (our married relationship is not going smoothly)
If we get divorced before beign citizen, would I face any difficulty in getting US citizenship (its already been 3 years that we landed in US and WE HAVE LIVED TOGETHER ALL THESE YEARS)?
Future consequences, After divorce if I get re-married, would I face any difficutly bringing her in US..??

Thank You for your answers in advance.

[immihelp]

You can file for citizenship now. You don't require your wife's help now. It does not matter if you get divorced before you become citizen.

Your dependency (for immigration) on your wife ended in April 2007 when you got your permanent green card, assuming the marriage was in good faith and not for greencard only.