Let's see:
5.5 gallon planted betta tank - This is set up and cycling. I still have some planting to do. Then it's a matter of time while my LFS gets some nice half moon male bettas
10 gallon Dwarf puffer tank - This is also cycling, but needs some serious rearrangement before I can even think about adding it's eventual population. It also needs time to grow enough alage to feed 3 ottos.
75 gallon Asian tank - sometime in May to July I am going to relase my painted turtle into the lake from whence he came (Note: this is a wild caught turtle that will be returned to it's point of collection, not some store bought turtle that is being released to certain death.) I am then going to upgrade the lighting to about 250 watts and double up the filtration capacity (adding a cannister to the emperor 400). Finally, I am going to transfer he plants and fish from my 55 and slowly stock it up. I will the sell off the 55 and it's stand & canopy.
33 gallon Flat Back Hex tetra tank - I'll set this up before I remove the fish from the 55. I'll put a bunch of feeder guppies from the 75 in it before I take the 75 down. This will get the Emperor 400 from the 75. It will be heavily planted with low to mid light plants and stocked with a big school of neons (maybe 1/4 to 1/3 cardinals), ottos, and pygmy cories, and a trio of Black lyretail mollies (preferably with a strong strain of P. sphenops so that I can get away without salt. I understand this is a sub-optimal stocking choice - however, this is what the wife wants.)
90-120 gallon Amazon tank - In the works for late summer/early fall. This will fill the spot in the living room the 55 occupies (which is why it can only be 4' long). Planted. Lots of driftwood. Angels and diamond tetras and hatchet fish and hoplos and plecos.
46 gallon Bow Front vivarium - I have a 46 BF with a broken center brace. I figure I can get away with filling to about 30 gallons. It'll get 3 leopard bushfish, an ABF, and we'll see where it goes from there. This is mostly to get rid of surplus livebearer fry.
Once the 33 is set up, I'll have a spare 20 high. Not sure whether to keep it orsell it and get a 30 or a 40 breeder. I'm split on whether this will be my new quarantine tank (making my current QT tank into a 10 gallon bumblebee goby tank), shellies, or a dark tank - lighted only w/ red & blue LEDs, filled with rocks and driftwood, and stocked with clown or albino bristlenose plecos, albino cories, and blind cave tetras. Alternately, if I get a larger tank to replace it, I may try and set up a skunk loach tank.