very nice, miranda!
i like it. the gravel color isnt quite my thing, though

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its looks simplistic, easy to clean, not too much gravel, filtration looks to be sufficient and youve got a heater tucked away behind one of the plants. now all you need is a background of some kind. itll do wonders for hiding the filterbox and cammoflaging the heater and intake tube. maybe you could get creative and try a few different textures and color schemes. the possibilities are endless...........
also, take a peek into the diy forum for some neat ideas. try the search feature at the bottom, just type in keywords like background and whatnot.
paul