To my utter bewilderment, someone managed to implement an SMB client for Palm handhelds. For those not wearing propellor beanies, SMB/CIFS is the Windows file sharing protocol (also implemented in Mac OS X and Linux as Samba).
RSS to IMAP goes Mainstream
Just to show that rss2mail and rss2pop3 are on the right track, I've recently come across Info Aggregator, which seems to do pretty much what I want at first glance (I'm also aiming at some sort of Bayesian filtering and full archiving - images attached and stored as part of the messages and not mere SRCs or HREFs, etc.)