NewsBreak
RSS News reader and weblog reader for Windows Mobile Pocket PC and Smartphone. With search and alert capability.
http://www.iliumsoft.com/site/nw/newsbreak.htm

NewsMob
Mobile aggregator that can work with both Palm and Pocket PC browsers.
http://www.newsmob.com/

Hand/RSS
RSS reader for Palm OS. Can download RSS feeds, either via a HotSync or using a direct Internet connection.
http://standalone.com/palmos/hand_rss/

Mobile RSS Reader
RSS Reader for mobile phones (MIDP 1.0).
http://www.dace.fi/

FeedBurner - Mobile Feed Reader
RSS reader for mobile handsets that support the J2ME MIDP 2.0/CLDC1.0 platforms, such as the Sony Ericsson P900, Nokia 6600, and Palm OS 5.
http://www.feedburner.com/fb/a/mfr

HeadLine
Reader for Nokia series 60 smartphones. Available in several languages.
http://www.wildpalm.co.uk/HeadLine.html

Mobilerss.net
A free online RSS aggregator for mobile devices. Users can add their selection of RSS feeds and transform them for display or synchronization on their PDA. Feeds are customizable for a specific PDA.
http://www.mobilerss.net

FreeNews
A reader that works on Java phones, Treo, and Blackberry.
http://www.freerangeinc.com/

Feeds 4 Phones
An online RSS aggregator that allows users to create personal lists of RSS feeds to view online or on any mobile phone that has an XHTML browser.
http://www.newchemicalhistory.com/rssreader/

Newstouch
Customizable RSS reader for Java and Symbian phones. Supports images, secure feeds and offline viewing.
http://www.newstouch.com/

Piconews
Free cross-platform news reader. Currently supports Blackberry and Windows Mobile (PocketPC, Smartphone).
http://www.piconews.com/

BerryVine RSS Reader
A reader for BlackBerry handhelds. With hotkey navigation, search and sorting options.
http://www.berryvine.com/details.asp?id=BVRSS