We have <a href="http://ridewithgps.com" rel="nofollow">http://ridewithgps.com</a> hosted on our own co-located server with <a href="http://colostore.com" rel="nofollow">http://colostore.com</a> for $50 a month. It's a 2U server with dual 700w power supplies, setup on two separate breakers. Server was setup within 4 hours of UPS dropping it off last December, and we haven't experienced any downtime or network issues.<p>Colostore is the best Zack or I have found so far, however, they are not the people to use if you require much help or a managed solution. Also, it looks like they have jumped up the price of co-location since then to $70 a month, which is still pretty good for the level of service they offer (2TB a month, 5 IP addresses). I would still happily pay that amount for their service.
For my toy stuff, about £30 for a smallish VPS in the UK, $20 a month for the smallest slicehost in the US, and I also have dreamhost (about $120/pa) that I use to host screencasts and things. I'd never put anything critical on there, though.
$12/mo Xen slice from prgrmr for web & source<p>$200ish a month from Amazon for hosting for some consulting work (although I don't pay for it)<p>$0 for a few apps on App Engine
I spend $80/Month I have 3 different accounts with different hosts which are good for different things. I'm going to be consolidating soon though..hopefully
working on a product POC, using Rackspace cloud (formerly mosso), paying around USD 11 - 15 per month for a very own instance of Jaunty but limited/shared machine resource with some minimum thresholds guaranteed.