A round of leaks today has potentially pinpointed the second week of April as the launch window for RIM's slick seven-inch PlayBook. An email purportedly sent out by Sears up in Canada confirms earlier echoes, informing buyers that the device will up for grabs on April 10, with preorders possibly beginning as soon as tomorrow. On top of that, an image from Staples' backend sent to Crackberry pegs a 33-day count down to start on the 15th, which lines up nicely with another leaked shot denoting an "ad date" of April 17. We've also received an unconfirmed tip from a Sprint rep saying that the PlayBook would be landing on the 15th, along with an a smattering of cases and a stylus? Finally, we've been sent shots of some PlayBook
