Sounds to me like it is condensation from your A/C. There are two little pipes that flow back to either side of the transmission that drain the A/C condensation onto the transfer case (on the one side). You will usually have two spots of water on the ground if you are parked in the same spot for more than just a few minutes. Nothing to worry about, it's normal.

If you want to check it yourself to make sure that is what it is, start your car up without the a/c on and see that it will no longer leak. Also, be careful when tasting engine fluids, some of them don't taste that good.

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2010 Lexus RX350 still new
2003 BMW X5 3.0i w/sport package w/68K miles. (gone Thank God!)
2002 Dodge Ram 2500 4X4 cummins diesel w/198K miles, custom repo truck
2009 Scion tC w/46K miles
2007 Suzuki SV650 custom streetfighter
2000 Lexus GS400 w/165K miles