i'll just assume that you have an internet connection of some sort. you didn't specify what though.
for email, snappermail is the best. best support for attachments, best html rendering (in emails), and not as bug-ridden as iambic.
for web browsing, their are 2 major groups here at cliesource. some insist upon netfront and others on the browser bundled with most palmone palms, i forget its name for the moment. the first renders pages superbly, they look like small internet explorer windows. the other doesn't do quite as good a job but at rendering but it is far faster. in the second you drag around the page if it formatted for larger-than-pda screen.
the clie is an important part of this balanced breakfast.