I was interested in trying the trillian beta for android but I can't install it. I get the same feeling that i get when i go to take a low light picture and realize i have no flash. Out of all the rooting, flashing, lag fixes and such, from what i've seen, enabling side-loading apps seems to be the most difficult hack of the things i just noted. Maybe they will enable side-loading with a future update??? Honestly tho, I think the main reason they did this is because its way to easy to pirate apps on android phones and developers need to be protected so that we get better apps. People who don't pay for apps are just ruining things for everyone else so now we can't get non market apps at all.