DNS routing via geo location of user - effect on Google ranking?

[financialhost]

I have recently been contacted by a company which claims to be able to somehow root the DNS geographically.
In other words they would determin the location of the user by IP address & direct them to a hosted version of my site.

This may resolve some latency issues & timeouts, plus it may also resolve some security issues.

My question is...
How will this impact Google's spiders when indexing the site?
I assume the spider would also get directed to the nearest hosting server...

Could this effect our SERPS in Google?

Would it have a postive / negative or neutral effect?

Any advice appreciated because i have never heard of this kind of DNS request handling previously.

[bumpski]

I'd like to hear your results!

One thought, it would be important that all instances of your site be identical at all times which could be difficult.

If you've ever done "nslookup www.google.com" you'll see multiple and even different IPs every time. So Google itself is using round robin DNS, so multiple IP addresses for the same site, shouldn't phase them.

This also makes you wonder about the ability to actually localize a website (determine it's location by IP), this might have some impact on SERPs.

[financialhost]

I was half hoping it would either have no effect on serps or boost serps geographically...

If Google's robot IP is UK based... this would also resolve to a UK server - so it would list higher on www.google.co.uk...

Does anyone know if it would work this way?

Anyone using a system like this?