The sump is a 40 gallon container from a local hydroponics place. There's a whole wack of different sump at these places; each shop seems to have its own supplier, so check around.
For phytoplanton, I started off using 2-litre pop bottles, but then I found cool 4-litre Rubbermaid plastic jars. They are easier to clean (you can stick your whole hand in). I rinse each with a bit of vineger and scrub the crud off with a sponge each day I consume one of these.
For air pumps, I've settles on TetraTec DW 24-2's. Fairly strong pumps at a good price. I've got one for the phytoplanton setup, and one driving sponge filters in each broodstock tank, both hooked up to a UPS.