I try to keep all of my IM stuff on my laptop, but I do use some apps to check out and maintain my websites. I got a little paranoid when I started noticing that almost every app I downloaded wanted to know too much info about my contacts, and what I was doing on my phone. I locked down all the syncs on my phone except for the few apps that I use.
The main apps I use on my android are webrank seo (checks for page rank, index, backlinks, fb likes, and tweets). I also use webmaster (to edit html, css, java, php), and I use andftp (an ftp client).
If I have to check out anything with my affiliate accounts on my phone, I just use Opera mobile, or Firefox browser.