I am happy to say that the new version of GReader works many times better on the Nokia N-Series Browsers. Instead of having to go to a crippled version designed for cell phones, you can use the normal reader. It's a bit sluggish (though that may be the device), but certainly serviceable.
I haven't used it that extensively, but the I was able to get around the various feeds without difficulty. One more app that I use on a regular basis available on the n800. I'm loving it.