The MyTouch Slide receives an much needed software update starting tomorrow August 4th and will continue through August 19th. The update is mainly for maintenance and will not be the 2.2 Froyo update. Sorry to let you down, MyTouch users! The software update will be Over The Air (OTA) and will bring some big bug fixes mostly aimed at battery life.
"Beginning August 4, T-Mobile will send an over-the-air (OTA) update to myTouch 3G Slide customers, which will provide a number of benefits, including increased battery performance and enhancements to software features such as Faves Gallery and Genius Button. The update will be sent to customers in staggered waves beginning August 4 and we anticipate all customers will receive it by August 19."
As for the Froyo update, there is no official time or date given to expect your Android upgrade. However, a lot of HTC devices are starting to receive their upgrades this week so we're sure that the MyTouch Slide is soon to follow.