I don't find the K3 browsing to be all that slow with the right kind of web site, mobile.nytimes.com being among the best. I'm not a big blog person, so I just picked
http://volokh.com/ as one I sometimes, if rarely, look at to see how it would work. Right from that url -- not well at all, especially if you, like me, prefer a large font. Their RSS feed formats nicely on the device and I think is fast enough, but like most it does not have full text. So then I started playing with different RSS feeds, putting them through tools that turn partial RSS feeds into full text, and then through the rsskindle.com tool that I find to be awesome but that isn't really very popular. Anyway, here is the result I now have bookmarked on my Kindle:
http://rsskindle.com/?url=http://www...olokh/mainfeed
Here's a shortened url that seems slower, although it could be my imagination:
http://rsskindle.com/?id=41
Response time? Well, I turned off the WiFi, since I am in my house but wanted to see how it would work outside. Result: 3G with two bars. Time to bring up the blog with the long url: 8 seconds. This was a lot less than I expected. Maybe tomorrow it will be 16 seconds, but tonight it is 8, which I think is pretty good. After the 8 seconds, I increase the font size, which takes about 5 more seconds.
So do you have to spend the better part of an hour playing with a web site to come up with a Kindle 3 bookmark that will be worth keeping? I mostly do. Your alternative in the case of the Volokh Conspiracy blog is purchasing the blog from Amazon, which in this case costs what seems even to a cheapskate like yours truly a very reasonably US$.99/month.
P.S. For purposes of speed, I have images and Javascript turned off on my K3 browser.