USB 1.1: What are the limits?

Hi, can anyone tell me the practical limits of USB 1.1? I know the technical limits (12mbps vs 480mbps for USB2), but what does that mean in the real world? for instance:

* Can i play MP3s stored on a HDD connected by USB 1.1?
* Can i play DiVx movies stored on a HDD connected by USB 1.1 (low rate encoded divx)?
* Could i watch a DVD through a DVD drive connected by USB 1.1?
* What other limitations would i have by not having USB 2?

(Still trying to decide between adding a PCI Video Card and a USB2.0 Adapter card to my Epia 800)

MP3's work fine, most divx i've played have skipped over USB 1.1, DVD I doubt, and if it's windows XP you get that stupid message everytime you plug something in thats USB 2 that says it's not USB 2 and to click here to see more information about the problem.

I haven't had any problems with MP3s or video (almost any format). Doubt DVDs would work too well... don't know.

So far I think the only 'limitation' I've noticed is using my USB RF remote while watching videos off the USB drive, which go through the same hub. I have to repeatedly push the buttons sometimes to get the cursor to pick up or move smoothly.

I have a usb/ide converter. I've tried it all...

CD-burning limited to about 6x
DVD - no way man
Divx,Xvid,3ivx - yep, worked for me (XviD sometimes a little iffy)
MP3 - oh yeah, no problaymo