I also suspended few months ago. I deleted all my campaigns and after more then a mouth of e-mailing with Google support I gave up... I hop you will have more luck.
Most of my business was based on Google adwords so it was a big trouble for me. I started to look for alternatives and got into the CPV world. I can tell you that for me PPC ADS are history. the current and future is on CPV.
[edited by: buckworks at 8:43 am (utc) on Mar 5, 2010] [edit reason] No URLs please; see TOS [/edit]
In regards to the original question - it depends on why you were suspended, whether you know why you were suspended, whether you've taken action to fix whatever the problem is, and whether you can convince Google that you've fixed the problem.
@Nirb what is CPV and why do you believe it's the future?
aha found it. CPV = pay per view advertising. Going to try it out, though Adwords display ads campaigns are going to be difficult to beat with their view through conversion tracking and insights feature, publisher network and recent above the fold feature.
"A disabled account may no longer run existing or future ads. Account access will still be available for the purposes of viewing historical data; however, no ads will be allowed to run on this or associated accounts in the future. Likewise, any new accounts opened by the disabled account-holder will also be disabled."
Step 1: Call Google: 1-866-2-google. Ask for help.
Step 2: If they do not want to help you, you will need to start over. You will need new credit card with a new name. Do not tie your new account to your old account.
Step 3: Before you submit your new account, double check to make sure your sites comply with the Terms of Service. If your sites were the problem. Move them over to a new domain and change up the content.
There you go, new account, fresh start. Make sure you play within the rules this time and you will be fine.