The latest e-book reader from Amazon.com, the Amazon Kindle DX, now includes native Esperanto language support. I've successfully converted an HTML file (with ĉ=& #265; etc., and specifying the UTF-8 character set in the header); the accented characters then appear correctly on the Kindle DX. The font size can be set to one of six different sizes, and the accented letters are displayed correctly in each size.
I've been experimenting with the new Amazon Kindle - it's a device for reading electronic books using "e-ink" technology. I've found it to be quite a nice device, allowing me to carry around many books in a very small space. However, the device is still in its early stages, and does not yet support the accented Esperanto letters (ĉ, ĝ, ĥ, ĵ, ŝ, ŭ). It will, however, display several other accented letters (vowels with acute and grave accents, umlauts, etc.).