ZDNet is receiving tips claiming Apple will upgrade its Mac Pro line with an Intel Core i7 -980x chipset, which certainly isn’t the first time we’ve heard Core i7-shaped gossip . Supposedly it’ll all be unraveled next Tuesday, the 16th of March. [ ZDNet via BGR ] More

In today’s Remainders: Efficiency. Get out of your house and watch the Final Four basketball games in 3-D; treat yourself to some Chilean wine while supporting their relief effort; start choosing the color for your Dell Mini 5, and more. More

MacHeist’s nanoBundle 2 offer is almost over, which means the really good apps are on the verge of being unlocked. Already available? Tales of Monkey Island , in both Mac and PC versions. By the time you read this post, RapidWeaver should already be unlocked, and it should be very, very close to unlocking Tweetie at around 50 or 60k bundles sold. Once Rapidweaver is unlocked, that should be no problem. Note: this isn’t just the Tweetie that’s out now, but beta access (and a free upgrade) to Tweetie 2, with the features that were found on Tweetie 2 for iPhone

Eager gamers have no doubt already seen the teasers, but Valve has now finally confirmed that its Steam game distribution service and Source engine will at long last be headed to the Mac. According to Valve, the company’s current line-up of games (including the Half-Life and Left 4 Dead series) will be available to Mac users in April, while Portal 2 will represent the company’s first simultaneous release for PC and Mac later this year. Better still, Steamworks for Mac also boasts a new feature called “Steam Play,” which will let you buy a game once and, for instance, start playing it on a PC at work and then pick up where you left off on your Mac at home (we’ll give you a moment to let that sink in). Game publishers will have to enable that feature themselves, but Valve says it expects most to take advantage of it. Valve confirms Steam for Mac, debuts in April originally appeared on Engadget on Mon, 08 Mar 2010 14:44:00 EST. Please see our terms for use of feeds

It’s apparently true: Steam is coming to Mac . Not just Steam, though. Judging by these awesome teasers released by Valve , so are Half-Life, Portal, Team Fortress 2 AND Left 4 Dead. Ho-lee crap . UPDATE: We’ve got all six teasers now

This comic was so unabashedly nerdy that we were *forced* to post it. [ College Humor and loldwell via theNextWeb ]

Jim Reekes is one fascinating guy. He created the start-up chime you hear every time you restart your Mac. He uses the word “ear-conic” in a sentence. And in this (slightly NSFW) interview with Dutch TV, he brings the awesome. The segment starts out in Dutch, but the interview is all in English. Other fun tidbits worth watching for: The name for “Sosumi” came out of Apple’s legal spat with the Beatles.

Opera 10.5 for Mac ’s out. It’s different from most browsers—the way it searches text in every tab from the address bar, for instance—but it’s ridiculously fast and worth a spin. Besides, can you have too many browsers?? [ Opera ]

Anders Norman’s home burned down recently. He lost everything he owns. Except for his iMac. That still works despite looking like a burnt marshmallow. Norman describes the events best—even if this is a poor translation from the Swedish: Unfortunately, the whole house and all things in there completely destroyed, so even the iMac.

So the preceding tweet from Office for Mac ’s official Twitter account asked for Macworld attendees to swing by the Microsoft booth and say “I love Office for Mac,” but to an uninformed reader, that reads like something else entirely . [ ChrisPhin ]