I am having a few issues installing some apps I used to have installed on my iphone (3.0).
First from what I can see from the apps store and Itunes it appears I still have some of this apps on my phone but they won't display and they are not hidden anywhere that I can see!
So I uninstalled them from Itunes and then reloaded them from itunes and they still won't appear and then I try to reinstall it from the apps store but it loads and says "installing" and sticks and doesn't move!
Install SB Settings from Cydia. Open SB Settings.. go to the more icon... then to hide icons and unhide the ones you have installed but won't show up. This happens when you have apps hidden and then restore from back-up.
If you did indeed have apps hidden you could also try going to settings/general/restrictions enable then disable/reboot
This seems to work most of the time.