Glenn Fleishman explains a tiny tweak you can make in Lion that enables AirDrop peer-to-peer file exchange to work over local area Ethernet and wireless networks. This enables AirDrop for older Macs that lack the right Wi-Fi chips to work with AirDrop out of the box, and it also adds wired LAN access for even those Macs that do have supported Wi-Fi chips. follow link
Hide TextExpander in the Dock
If you don't want to see TextExpander's icon in the Dock and the application switcher, you can remove it. Just open TextExpander > Preferences > Appearance, and select Hide TextExpander Icon in Dock. You'll still be able to access TextExpander from its menubar icon.
Enable AirDrop for All Macs with Lion
Check out the Take Control ebooks that expand on the topic in this article: