Not sure if it works with Leopard, but if you are *not* obsessed with running your *laptop* with its lid *closed* (can't imagine too many situations where that would be *really* advantageous!), Caffeine can keep your computer from going to sleep without changing any settings . . . *no* cluttering of Dock, and only *one* click.

Oh, did I mention you'd save almost 10 dollars over Sleepless because Caffeine is FREE?

I've been using it for years with Tiger and it works flawlessly. No "floating palette" thingy. No problem --- at least not for me. IF all you need is simply something to keep your computer from going to sleep and want "one click" activation/deactivation and do *not* want to spend $9.50, Caffeine is a *solid* option.

Just checked the site. Version 1.1 is for Leopard. 1.0.4 is for Tiger. Both are small (less than 300k) files to download. It just works.