The better memory/application handling built into this makes it a no-brainer at $9.99:

WisBar Advance 2 expands upon the successful task management features found in the original WisBar Advance. Now more tightly integrated with the PocketPC operating system, WisBar Advance provides greater responsiveness and a richer user experience.

[ Lakeridge Software ]

And it has a light skinning engine to boot! So my Microsoft device can look like an Apple... (or Red Hat if I can find that skin...)