I know these aren't necessarily the kind of "holy shit!" items you were looking for as ASMI pointed out, but I think my first two HOLY SHITS are going to have to be that:

A) This blog has been around at least five years and I just discovered it yesterday. I believe I would be a much cooler and smarter person if I had known about it back then. And...

B) The internet is a massive, global thing connecting a gazillion people, and one of them, whose work I was going to point to as a holy shit of my own, posted a comment on THIS VERY THREAD. At least, I think it's him. There can't be *that* many Jeph's out there, right?

Those points taken care of... I would have to say, I agree with all who pointed to mp3, iPod and wikipedia, but they've been thoroughly covered already.

So personal holy shits for me, in no particular order:

Firefox/Tabbed browsing - I have N.A.D.D. probably as bad as it is possible to get it. I'll spare you the enumerated list of things I have open, but in this ONE WINDOW, I have *nineteen* tabs open. I love doing a million things at once. I hate having a million windows open. Being able to find my desktop is useful and finally... a solution was created. AMAZING.

A kind of sub-holy shit could be, "Holy shit! Microsoft's latest IE release has a tab feature too!" But it really sucks :( Well, at least they're trying.

Questionable Content/Webcomics - To me this is more about expanding the USE of a technology rather than the ability to put graphics on a webpage-- which I'm sure was amazing once, too--but at the time I was first introduced to the web, it was already something you could already do and as far as I knew back then had never been any different.

So for me, it was seeing a comic strip somewhere that wasn't the Sunday paper that seemed impressive. Not the fact that you COULD do that with the web, but that somebody thought of it and DID do it, I guess.

And... yes, I know QC isn't the *first* webcomic ever, but it's the first one that I was ever really able to truly relate to. I think the first I ever read was PennyArcade and I'm some nature of a geek for sure, but I'm not much of a gamer so I would only get a handful of jokes. The holy shit about QC specifically was more that there are comics for music geeks too. And he posted *in this thread*, which is so weird.

Trillian - You mean I can talk to people on AIM, MSN, YAHOO, and ICQ and only be using ONE CHAT CLIENT?! AND IT HAS TABBED WINDOWS?!!!11 WHOAH. I think I need to sit down.

Spellcheck - Now, if only people would USE it. :D

Pandora/The Music Genome Project - This is seriously cool. I don't really know how it works and I don't care. I was referred to Pandora by a friend and have loved it ever since. Netradio in general is pretty awesome... And did no one mention podcasting? Well, most of these posts are from 2003 or earlier. Yeah, okay, moving on...

Macs That Run Windows...NATIVELY - 'Nuff said.

Skype - My first call on Skype was the best HOLY SHIT moment ever. Suddenly, I could talk to people all over the world, like ACTUALLY TALK TO THEM and I didn't have to call them and it was FREE and the sound was good and it was completely glorious!

GoogleMaps/AJAX - Finally, I bother to mention something technologically significant and I am too tired to actually elaborate. It's nearly 6am here and I haven't even SEEN my bed since yesterday.

Okay, I think I am done wasting space in your blog. Mainly because I think I have probably written half a book in here and partly because I am about to pass out on the keys from lack of sleep. But I would like to say, I am loving your blog. I'm so glad I found it.