You can set up the feeds you want to read in the settings / feed settings menu. NDSMail also looks for a file called ndsmail.fed in the flash card's root directory. ndsmail.fed is a text file, each line contains the URL (full URL with http://) to a RSS or ATOM feed.
To download the feeds, press on the button in the main screen to switch to mode, then press Receive.
Please note that I did not disable the New/Reply buttons in feed mode yet, pressing them will give unpredictable results.
I added 2 feeds as defaults so you can test it right away.
Bug where settings file got corrupted should be fixed (can't test it)
Shows status while connecting to access point
Some mail display bugs fixed
Many more things I can't remember
Note that most bugs with incomplete/corrupted messages are because of a bug in dswifi which will be fixed soon.