PDAphoneHome - A discussion forum for PDA Smartphone users. Has an FAQ and file sections.

My-Symbian.com - News and discussion site for Nokia Communicator users. Includes technical information and user tests.

MyTreo.net - Has Treo news, reviews, Treo downloads, community forum and  support.

Treonauts - A bloguide with links, news, reviews and views on the Palm Treo.

SmartphoneThoughts - Has daily news, views, rants and raves on PDA smartphones.

MSmobiles - Has news about Microsoft powered PDA cell phones including Microsoft Smartphone and Pocket PC Phone Editions.

TreoCentral.com - Has news, discussion, reviews, ringtones and links for Handspring Treo users.

TreoAddicts - Has Palm Treo pictures, news and articles.