As we all know, we'll say goodbye to Hatena on the 31st of May (tomorrow at the time of writing). It doesn't have to be this way. I've been digging around and I've found all the URLs my DSi accesses when it goes onto Flipnote Hatena, listed here for those who want to know:
http://flipnote.hatena.com/ds/v2-eu/en/eula.txt - Terms of Use
http://flipnote.hatena.com/ds/v2-eu/en/confirm/upload.txt - About Uploading Flips
http://flipnote.hatena.com/ds/v2-eu/en/confirm/download.txt - About Downloading Flips
http://flipnote.hatena.com/ds/v2-eu/en/confirm/delete.txt - About Deleting Flips
http://flipnote.hatena.com/ds/v2-eu/index.ugo - The index page, in their strange .ugo format
They're not linked because you can only access them from the Flipnote Studio app (or a PC pretending to be the Flipnote Studio app, although you could just use your PC as a logging proxy between your DSi and the internet with a program like Fiddler, with which you can spy on your DSi and Hatena's sort of internet conversation with lol). I've also found a script called PPM.py, by pbsds, which can extract all the data from the flipnote (apart from sound, pbsds has found out that if you multiply each byte by 16, and play it as a 32000Hz PCM data, you get about the correct speed, but it has lots of noise)
If you want the files then email me at flipreborn@outlook.com and I'll give you a Fiddler .saz archive of the data. You'll need Fiddler to open it. By the way, if anyone has some server space (we need a virtual private/dedicated server, or shell access on one, or if not a DNS server, Python and PHP) please leave a comment.