Google indexing and crawler question

For the longest my sitemaps 'control panel' on google said my site wasn't indexed.

I just checked today and there was a total of one page on my site that had been indexed (and it was an obscure page from an old topic).

How often does google add/change it's indexed pages? Is it everytime a crawler hits the site? Is it once a month? When it feels like it? or is this another one of thse unknown google things?

On a side note: I have been really researching this seo topic. It seems that a site seems to get more love when other sites link to it. Perfect example is yesterday I went to my other websites and just put a little link on the bottom of the website. Now all of a sudden my site has been indexed by google where as before it wasn't. Coinsidence? Maybe... (probably)

So now I'm off on a rampant of trying to get sites to link to mine. I guess that's a whole other topic.

Thanks
edit: I've only had VBSeo installed for about 4 days

Originally Posted by amnesia623

So now I'm off on a rampant of trying to get sites to link to mine.

Definitely. Linkbuilding is a very important part of the process. Our new linkback features might help with that, especially if any of your threads or posts link to relevant blogs.