Lock Screen for 5th edition devices improves greatly your keylock feature.
Currently it has the following features:

* Show the current time and date
* Show the battery status
* Show missed calls
* Show unread messages and emails
* Show bluetooth and WLAN indicators
* Show GPS indicator (works only in S60 3.2 and 5.0 devices)
* Coming soon: Disable blank screen in touch phones, Music status