James Davilla posted a link at PaleoJudaica to a free version of the Reformatted Soncino Babylonian Talmud. As Davilla notes, this version was translated and prepared for the Soncino Press in 1935 – 1948. These files are PDF so they can be read on a side variety of devices. I used the new Send To Kindle app from Amazon to send the first Tractate to my iPad Kindle App. Loading the files into a regular PDF reader allows for copy / paste of text.
The text is very readable and well-organized, with clear markers for sections (Berakoth 2b). I find the text more readable than many of the other versions of the Talmud available. Logos (for example) sells the Neusner translation, but the way the text is formatted is more difficult to read. The text is available at the Internet Sacred Text Archive, but these files are much easier to read. What is missing is an index or table of contents so you can go directly to a given section. These files include introductory material as well.