Help With Google Cache

I have an ecommerce site, ranks page 1 in google for a very competitive keyword. I update it whenever I add new products, or just add or change some text around to try and keep it fresh. I ping my backlinks, blog posts etc. My google cache is usally around 2 weeks old, sometimes older and no matter what I try I can't seem to get google to refresh me quicker.

My main competitor doesn't have this problem. His cache is never more than 1 day old. I don't see any significant change in his site on a daily basis.

What gives? I have done a backlink check on him and don't see anything obvious as to why he has googlebot drooling over him! Don't get me wrong - I'm not hung up about it - more curious. I do get a bit frustrated when I do site changes such as title tags and H1 tags etc and am still waiting over a fortnight for these to kick in.

Is it just likely he has a high performing blog somewhere? And are there any tricks to get google refreshing me quicker? Yeah - google loves fresh content - I know, just doesn't seem to matter. I throw rss feeds out, I social bookmark, I throw links on Identica and ping them - nothing seems to get that feckin bot to me quicker.

I think its probably just a case of not liking a competitor doing something better, and not knowing how they do it! Any suggestions?

If your in spot one i dont think this is an issue,
and if its really competitive then you would be getting indexed daily to hold this position.

Are you in google local search?

1. Add google maps to contact page.
2. Add products to google base
3. Create a blog to your site update daily
4. Add blog to google news

Heh grabdavid - thanks for the input. I'm gonna implement what you suggest over the weekend. I've gotten a bit lazy with that side of things, or maybe just a bit time swamped!

I checked a few other number 1 sites in similar niches in Traffic Travis, and he's still the only one with a daily cache update. I'll see if your suggestions help.