Sending RRD data via devmon to existing columns

[Matthew Epp <matthew.epp (at) us.army.mil>]

Is it possible to send a status line to Hobbit from an external source 
like devmon, with the proper DS field and a value for something like 
percent of used memory, and have it create the rrd files and graphs?

I've tried using one of the existing rrd files as an example, sending 
various status lines using devmon, with no other text in the message, 
such as:
realmempct : 50
or
real : 50
or
memory.real : 50

But none of them appear to work.