I've been running Windows Home Server RC1 for two months now, and I love it. There's very little not to like about it.  I won't bother re-hashing what it is and what it does, because you can find plenty here, here, and here.

My experience with it has been awesome.  So far, the only things I can complain about are:

• It doesn't support the scanner function on my HP all-in-one printer. HP never released a Windows 2003 driver for it. So I can use it as a print server, but I have to pass the scanner through to a Windows XP VM to use it.
• Mozy's consumer offering doesn't support it. Admittedly, duplication puts my mind at ease regarding losing data to a hardware issue, but there's always that need in the back of my mind for off-site backup. The way I've worked around it, for the short term anyway, is to run Mozy on a Windows XP VM inside my WHS and do an hourly mirror of the most important 4 or 5 gigs worth of data (pix mostly) to the virtual machine so Mozy can back it up from there. I did try the one consumer-oriented online backup solution that supports Win2K3 (I think it's i-Drive), but I couldn't get it to reliably map the drives to backup if I wasn't physically logged in on the WHS box. Honestly, I'm thinking I may just revert to a semi-annual DVD going to the safe deposit box for my offsite backup.
• I had a motherboard die on me, and I tried simply replacing the motherboard with a new one (and upgraded to a dual-core CPU, too). WHS booted up, but, long story short, it left me in a less-than-satisfactory place (as I expected) so I went ahead and did the reinstall option. This went well, and recovered all of my shared folders nicely, but I had to recreate all my users, and for some reason, I can't set up the dynamic host name function anymore. As soon as I put in my Windows Live ID, it bombs out with unknown error "80072F19," which is apparently related to some sort of untrusted certificate coming from the Windows Live servers. I've tweaked some IE security settings, and added some IP addresses to the trusted sites, and still no dice. Weird.
• Up until today, I didn't realize that the shared folders had file versioning. It never really occurred to me to check the file properties for a previous version tab, and that this would only be viewable from a connected client (not the server), and then only if you're running XP, Vista Business, or Vista Ultimate. But I did stumble upon that today, and was very happy I found it. That's half the reason I use Mozy - so I can fix a "whoops."

I did have one moment of WHS-related sheer terror today. I noticed that about half of my 30 GB library of MP3s seemed to be unreadable. My pictures and documents are backed up via my XP VM running Mozy, but my backup strategy for music and videos relies on WHS.

So, as I was freaking out, seeing if my Creative Zen Vision:M supported copying my music off of it back onto the server, I rebooted the WHS box. When it came back up, everything was fine.

The best I can figure is that it has something to do with the extra external hard drive I added yesterday. I have a 120 GB external drive I was using to take work home, and, since I'm quitting that job this week, I decided to put that drive to better use as a member of my WHS storage pool. So I plugged it in, formatted, added it to the storage pool, and left it alone. I'm wondering if there was some kind of a hiccup or something in the file duplication process the next time it balanced storage (hence, why only some of the MP3s were hosed).

At any rate, I'm buying this as soon as NewEgg lists it.  It's 100% pure awesome, and worth every penny.

(Full disclosure: This post is made up primarily of snippets of forum postings I made on Scott Hanselman's forum...)