i grow carnivorous plants. just a few things to consider:
be careful when mixing carnivorous plants in a riparium setting...there are a few things that need to be noted before taking this project on. first of all, not all carnivorous plants are capable of being placed into a riparium setting:
highland nepenthes, heliamphora and epiphytic utricularia: all of these need a night time temp drop down to the low 50s (40s if you can afford it) at night. furthermore, these plants require excellent drainage as they live off of cliffsides, or in trees--being waterlogged might not be the best thing for them.
temperate carnivorous plants: (dionaea, utricularia sp, pinguicula sp, sarracenia, drosera) the venus flytrap requires well drained media of about 60-70% sand and 40-30% peat. it does not like to be waterlogged and will rot over time. sarracenia can withstand waterlogged conditions provided that the rhizome stays above the waterline. temperate drosera and pinguicula can also withstand waterlogged conditions as well. however these plants will need to be placed along with high rate nutrient sucking plants and with fish that have a very light bio-load; the reason is because CPs come from acidic as well as nitrogen deficient environments (which is why they need to capture insects in the first place) and have adapted to live in such. a nitrogen rich environment will burn and rot the roots and eventually the entire plant will collapse. furthermore, they require a dormancy during the winter for long term cultivation.
cephalotus, the australian pitcher plant needs to be in elevated areas, and cannot be kept waterlogged unless the water is flushed with O2, and is moving. same with darlingtonia (plus dormancy since it's a temperate)
lowland nepenthes might be your best bet. Nepenthes mirabilis and ampullaria might be suitable for what you are attempting, but do keep in mind they get rather beastly, especially when they start to vine.
petiolaris drosera may also be a viable option. i've seen it done. but those are incredibly rare in the states and often will need to be imported from europe to acquire it.
another option is to have some sort of solid, impenetrable barrier between water and land, cover it up with rocks. that way you might be able to grow subtropical drosera, pinguicula, sarracenias, pretty much everything you'd want save those that need a temp drop at night.
best of luck....
PS: there's always UG and gibba.