Yes, yes, yes !
Miking a keyboard amp can be much cooler than running direct for certain sounds, and in many ways the end result is more pleasing to my ears.
I have an old Keyboard magazine from the mid-80's that has a roundtable discussion with top engineers/producers on the subject of recording keyboards. Most of them said they like to record them miking an amplifier because direct is sometimes kind of sterile sounding.
I mic a PA speaker (Peavey SP3) instead of an amp, but any good keyboard amp will work. I use a combination of SM57 and a Crown CM700 (small diaphram) to record it. I sometimes also run my synths through
a Sansamp PSA-1, Bass Pod, or a tube preamp. I also use a variety of stompbox effects pedals for chorus, flange, or distortion.
However, most of the time I just record direct. It just depends on the synth I'm using and the effect I want to achieve. Miking an amp is time consuming and can make me lose concentration when I'm recording. That's why I love to use amp modeling toys and tube preamps to "dirty up" the signal and introduce subtle distortion to a synth sound. If you have a Pod, J-station, V-amp, DG Stomp, etc. try it on your keyboards and drum machine sounds.....you might like it.
Good luck