That one only does splitting takes up a whole rack space and uses XLR connectors...
If you don't mind making up XLR to 1/4" cables...here's one that does mixing and splitting...http://www.axemusic.com/product.asp?PT_ID=all&P_ID=6903
Alex Lifeson uses this one
PS you can make up a splitter quite quickly if you purchase a
1- Radio Labs ST-DA3
1- Hammond aluminum box
5 - 1/4" jacks (1 input and 4 outputs)
1 - 2.2mm x 5.5mm Power Jack (isolated!)
Here's one that I made up for a pedal board that has a switch to mute the guitar and feed a tuner...
Drill a few holes in the box for the jacks and to wire it up, the DA-ST3 has screw terminals so the only soldering you have to do is to the 1/4" and power jacks. Close her up, connect it to your voodoo lab pedal power +12 VDC and then you can buy any mixer (passive or active) of your choice...maybe the...http://www.sweetwater.com/store/detail/PowerMix3/