[vevel]

I currently have an Amazon Kindle (the keyboard version). One of the great things about it is that I can mail documents to the @kindle address, and get the content delivered to my e-reader. Also nice is the fact that there are some browser plugins and apps (Later On Kindle, Kindle It/Push to Kindle, etc.), that let me send web pages (including technical articles, rss content, etc.) to the Kindle for reading.
Now, that being said, there have been some great sales this December on various e-readers not made by Amazon. I've thought of picking up another e-reader for work (so I can occasionally take a break from the computer screen).
Are there other vendors that have similar services? Would I have to use something like Evernote or Calibre and so on to get formatted devices to a non-Amazon reader?
Thoughts and comments appreciated. Thanks!