Yup, they are pretty much considered "non-serviceable" due to what nicolaselias said.
I would use the product he recommended as they do work well. I plan on getting one of those and a tranny cooler sometime!
However, how has your transmission been maintained? Generally, most people follow the 3 drain/refill method. Drain your transmission fluid, refill, and drive 50-100 miles and repeat 2 or 3 times. With that being said, ONLY use Honda transmission fluid.
Ya inline filters are a good idea on Honda automatics since they don't have a pan to drop.
My wife had a '99 Civic EX Sedan 5-speed (RIP deer ran into the pass. side of it!) and I have '99 Accord EX 4-cyl. Sedan in 5-speed with 190k on the clock. I want to take my Honda to 300k so I am going to need some help!!
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