I can print Word, Excel etc from SugarSync but it basically shows a picture of the page - like a PDF version. It prints fine but of course you can't edit or format in any special way for printing.
The Moderator may chew me out for mentioning this in more than one post but I was able to get AirPrint to work on my PC with HP printer without buying ANY app. I used the directions at How to Install AirPrint to Enable Wireless Printing on Windows? | Jaxov
Now I can't guarantee anything about using their download. For all I know I've installed a virus or a trojan but it does enable printing from my IPAD. The downside is it uses printer sharing so the host PC must be on and awake when you use it. That's no biggie for me cuz my laptop is just about always open when I'm home.
Now if there were an app that let me print to my network wifi printer from a different network (from the Internet in other words) whether my laptop is on or off it would be worth paying for (unless I could figure out a way to do it myself!)