Right click doesn't work in KDE. However, there are alternate ways to do everything that you would normally use right-click for, so I personally just use the alternates. Do you need help figuring out the alternative method?
As for Bluetooth keyboard - Penquinbait included a link to Maemo Control Panel in the system tray of KDE (it looks like a wrench) Tap that and turn on bluetooth and use your BT keyboard just like in Maemo. Only difference is that it's more difficult to remember to turn BT off when you're done (it really sucks up battery) because there's no icon to remind you that it's on
I don't have KDE installed, however, I'm wondering if maybe they do it like some other apps do... vncviewer, for example uses the "-" key (zoom out) for the middle mouse button and the "+" key (zoom in) for the right mouse button. In vncviewer, I hold down the + key and then touch the screen with the stylus to get a right click.
Probably not, judging by some of the comments above.
Sorry couldn't resist the jab.