There are some that just don't work because they use APIs from android that the RIM android runtime doesn't support or are blocked by RIM.
Unfortunately I don't directly convert apps anymore, BUT a new guy has another great list going, you can request an app through the link below as well as see what apps he's converted:
Working Converted Apps List
Request an Android App to be Converted
Hi. Can you check those links please? They are not working for me.
Thanks. Not working in my Firefox (perhaps some addon causing problems) but does work in IE9
Playbookapps provide you a link to a FREE android marketplace app, I will download it for you and convert it to BAR. I am now posting all converted apps and if they work or not on this google doc: Full Converted App List The link above will be updated continuously with any new apps that get requested! Some people have asked to donate, you can if you want through paypal here !I would love to have this for work Thanks