Yeah, just letting you know Riot has the Glacial Olaf, Sinful Succulence Morgana, and Monarch Kog'Maw for half price between May 3rd to the 6th. Normally I wouldn't care too much for skins, but you guys remember when you got free RP? The Olaf skin is really sweet, and at 50% it is only 260 RP, so if you saved your RP, it's basically a free skin. Cool, especially because Olaf is moderately a common pick. WOOT!
The link to the source.
There are a few pictures on their page so you can see how cool the skin looks. Ghostly, right?