This Wednesday: Undertow washes ashore on XBLA island

Although the hubbub may be about the new, downloadable Halo 3 maps socking it to you next month, Microsoft also used today's announcement to remind us that we'll finally be seeing Undertow on the Xbox Live Arcade this week. As you can see from the above trailer, it's basically BioShock meets Aquaman meets shooting things. ... Or something.

But this XBLA release got our old friend Stephen Totilo wondering: How do publishers make the most of their 50 XBLA megabytes? He got the answer to his question recently, via a pie chart from developer Chair Entertainment. If you're part of the tiny subset of the human race curious about this sort of thing (yes, that includes us), you can check out the breakdown right here.