Is there an appliance to monitor if any of my servers go down? This will include switches, routers and servers that are not on the vmware network. I am currently using solarwinds on XP. But I must upgrade to windows 7 or find an appliance that can ping all of my nodes.
FreeNATS will do that for you and is available as a pre-built appliance.
The current production one is pretty old based on rPath but there's also a new one up for testing at the moment.
The main site is: http://www.purplepixie.org/freenats/ which has links to download the current version.
Any problems with that you can try the new trial at: http://www.purplepixie.org/freenats/wiki/Virtual_Appliance_6_Trial