You may recall last summer when we discussed Heroes of Newerth, a title from S2 Games that's based on the popular Defense of the Ancients mod from Warcraft III. We passed out some closed beta keys, and there seemed to be a ton of interest, in part due to the fact that they have a Linux client. Well, if any of you missed it or want to see how the game has progressed since then, now is your chance — the open beta begins tonight (March 31). There's a countdown on the sign-up page that shows when you can register.

Ant notes a piece up on WBUR Boston addressing theories to explain the universal human experience that time seems to pass faster as you get older. Here's the 9-minute audio (MP3). Several explanations are tried out: that brains lay down more information for novel experiences; that the "clock" for nerve impulses in aging brains runs slower; and that each interval of time represents a diminishing fraction of life as we age.

Activision confirmed the existence of Guitar Hero 5 last week, and now they've released details about some of the game's new features. Quoting 1Up: "... the new Party Play mode allows players to swap instruments and difficulties on the fly — even in the middle of a performance. You'll also be able to play Guitar Hero 5 with any combination of instruments, be it four drum kits, two microphones and two guitars, or any other possible configuration of four players." They also listed a few of the songs, which include "All Along the Watchtower" by Bob Dylan and "Ring of Fire" by Johnny Cash. Meanwhile, their music-game rival Harmonix has revealed the full set list for Rock Band Unplugged, coming out early next month for the PSP.