Korg Poly800/EX800 Users

i'm sure this is nothing new.  but i've been using the midi in/out to 
arrpegiate my poly -- the midi out sends the signal to the program 
which is set to arrpegiate, which sends a signal back to the poly.  
i'm using Fruity Loops to do this, but you could use any good midi 
program, I bet.  It works really well.

My question:  does a hardware equivalent exist for what I'm doing?  I 
mean, like a little box that you could plug your midi cables into and 
select the arrpegiating mode or whatever.  Cause that'd be rad.

Also, I'm trying to think of a cheap way to sequence the poly 800 in 
a live setting (think way cheaper than a laptop).  I had an idea... 
that maybe sequencing software has been written for little palm pcs.  
and as long as they have usb, the midi is a go.  or some kind of 
inexpensive little sequencer gadget.  help.

eric