I ordered my Axim Adv. last night and saw under the O/S part, there was a changed O/S from before. Instead of just Win2K3, it had Win2k3 Premium. Is this a new release of the O/S or is it kinda like the Professional version of Win on PC's? I'm really curious about this.

It's all the same OS.

Win2k3 Premium has all software in rom about 27MB.
Used in PDAs with 32MB or more rom.

Win2k3 Professional doesn't include Media Player, MS Reader, VPN or the TS Client in ROM, they come on the companion CD to be installed in User RAM Space. This rom is only 16MB.
Used in cheaper PDAs with only 16 MB of rom.

I hope this helps explain it.