Great idea!! It will be much more comfortable to switch between apps from now on!
Just one thing, I have the sgs i9000 and I don't if its because of memory management or the built-in task manager, but I don't see more than one or two apps on Sw...
I really liked it!! :D
One thing I've noticed, about the Whatsapp shortcut:
I guess its also the problem of kmelkon.
the whatsapp numbers are always saved with the country prefix, for example:
In israel, the whatsapp numbers are +97254123123...