Site Building-- a few issues

[load_runner]

Hi all,

I have just recently decided to make my own site. The site is currently running on Drupal and have also got a blog installed on a subdomain.

I have a few questions :

1. I have tried to submit my site to google and they have begun indexing it.. but whatever sitemaps i've tried to submit, there is some problem or the other with it.
i used xml-sitemaps.com for creating sitemaps but google has found some error in it. what should i do to get a proper google recognizable site map ?



2. what do you think is better for SEO purposes --

blog.mydomain.com or mydomain.com/blog ??

currently i have created a blog.mydomain.com but would like to know if it is the right way ahead.



3. what all can i do to get my site to be indexed faster on google, yahoo and bing ?


Please help me out.


PS: my site is ashwinz.com