Keep open option – Lancelot doesn’t automatically close when you click something in it, but closes only when it loses the focus. You can set this option in the configuration dialogue, or you can hold Ctrl pressed while activating items in L.

The second thing is that the GMail plasma-lancelot DataEngine is working well and I’ve placed it in playground/plasma.

As you can see in the screenshot, it behaves differently than the Kontact engine in L – it shows a list of unread mails instead of the list of directories that have unread mails in them. The reason behind that is that I use GMail’s Atom feed to get the unread messages.

I have placed it in playground not because it is unfinished/unstable or anything, but rather because it is not intended for general use, and because there is no GUI for choosing the contact engines.