In the past we had posted a Step-by-Step guide to enable multitasking for Cydia by changing plist service parameter however Jailbreak community has now release CyTask which does the same without having hassle to manually change the plist identifier. It is recommended that only experts should try using this tweak as for normal iPhone, iPad and iPod Touch users wont be able to benefit a lot as automatic updates remain suspended till the time Cydia is running in the background.
Sneak preview CyTask in action,
CyTask can be installed using the procedure here.
In order to enjoy these Applications and Tweaks you need to Jailbreak so you might like to see Redsn0w Jailbreak & JailbreakMe or to Jailbreak while preserving your baseband (software unlock) see TinyUmbrella, SnowBreeze & PwnageTool.
For more stuff check out our Jailbreak Apps & Tweaks Gallery for iPhone/iPod, Themes Gallery for iPhone/iPod,Games Gallary for iPhone/iPod & Appstore Apps Gallery for iPhone/iPod.