Hondas use the same interface/protocol as almost all other post 95 japanese cars.PlaneJob said:
There are several cheap (<$100) OBDII to rs-232 interfaces one can buy. You pretty much need a laptop, but (depending on the software) it's a great general diagnostic tool. PDA interfaces and software are also available but are more expensive.
There are some cheap (<$150) handheld devices that read and clear DTCs, but that's about all they do.
If you are asking if Is there something that "knows" Insight specific DTCs (i.e. spits out a message, not a number). Probably only pro shop grade stuff that costs more than $1K. It's cheaper to get a cheap interface and the service manual, all the DTCs are listed in there. (along with steps you should take when you get that DTC)
I bought this PC interface after a CEL. It turned out to be the usual O2 sensor problem after a long trip with lots of lean-burn.