Blog - Maemo WordPy / Mauku
Twitter - Mitter
Word Processing - AbiWord (still beta), or the entirety of the OpenOffice suite through Easy Debian.
SSH - OpenSSH, and there's a Qwerty12-ported copy of Putty running around somewhere.
Media - Canola
Podcast - gPodder / Canola
Chat - Pidgin
IRC - XChat

Have a search though, all of this information is already available around this forum.
Plus have a look on downloads.maemo.org

Might also be a good idea to get your hands a bit dirty with a reflash (I'm guessing the firmware is going to be a little behind).