High Current Many-Channel DAC
DACs typically don't sink or source much current; typically to drive the output harder you use an op-amp which can drive to your requirements on the output of the DAC. If you need even more current than that, you can use a pass transistor or FET on the op-amp output and close the loop around it.

TI has a three part series on interfacing op-amps to DACs which probably goes into a lot more detail than you're after, but which I'm providing here for others interested in it. 

Op-Amps for Everyone has an entire chapter (both safari online links) on interfacing DACs to loads which you might find enlightening, in particular "Current Boosters" in 18.7.1.

This psocdeveloper forum post goes into more detail about using a FET in the output path of a voltage-following op-amp which is connected to the output of a DAC in order to boost the current capability of the DAC. As I mentioned though, practically any op-amp can give you 10mA sink/source capability so you probably do not need to go this far.

A quick Digikey search shows op-amps like the MAX4495, AD8625 and HT1104 can supply 15mA per channel. You might want to take a look there and see where it leads you.