I've been using dropbox in much the same way you use Google docs. I like that added feature that the files are available on my computer and I can easily get them through the drop box site if I need to.
I've also been using my ipad in much the same way as you use your kindle. I've read so many books since I got it.
I could probably increase my online participation. I think this is my 6th comment on HN. I should really fix up my blog too.
Dropbox is another tool I use, mainly for quick file transfers. I used it a lot in school, where I would print out finished assignments (have to hand something in I guess), but then put it on Dropbox as well in case something happened to the hard copy (like I stupidly forgot it at home...).
The iPad is good for reading too, though I imagine my eyes would like the Kindle better. It's really easy to stare at for hours. I want to get an iPad for reading Instapaper stuff and RSS feeds.
What's your blog?