In know this has been answered with the usuals (game servers, web servers, vpns, etc.), but does anyone have some creative uses for a VPS? Here are a few of my most used VPSes:
4GB @ RamNode powering web servers
1GB @ RamNode powering CraftStats pings (slave 1)
1GB @ RamNode powering CraftStats pings (slave 2)
A variety of 128MBs for backups
512mb for a VPN
There are a few others, but all fairly boring.