Firmware updated to 2.6. New amp models available (at a cost) and new global EQ.
 
Us 300/400 users need to be patient but will be treated to a similar upgrade shortly.

Thanks Rain!! 

It is actually only for 500x users. Plain 500 users have to wait as well

I'm wondering if those add-on packs have anything to do with the POD Farm add-ons. Because I actually own most of them. It'd be nice to run some of that stuff on the POD HD.

I'm still on a POD XT Live. Poor me. But I do have all the POD Farm 2.5 add-ons.

mudgel
I'm still on a POD XT Live. Poor me. But I do have all the POD Farm 2.5 add-ons.

Truth be known, there are things for which I find my old POD 2 more adequate than the POD HD. I'd be curious to test an XT.

Rain
I'm wondering if those add-on packs have anything to do with the POD Farm add-ons. Because I actually own most of them. It'd be nice to run some of that stuff on the POD HD.

Actually, yes. Some of the new amps from the add-ons are from the POD X3, AFAIK the same amps are used in Pod Farm.
So the non-HD amps from this list are from the "old" X3/PodFarm, don't know which are HD though :)
( I have the HD500 so I'm still waiting for the new FW)
 
New amps are:
Peavey^® 5150^® (Block logo)
Bogner^® Shiva
Remastered Marshall^® JCM800 (Model 2204)
Line 6 Insane
Line 6 Big Bottom
Line 6 Variac'ed Plexi
Line 6 Purge
Line 6 Aggro
Line 6 Smash
Line 6 Octone
Roland^® JC-120
Fender^® Champ^® (Tweed)
Orange^® OR80
VOX^® AC30 (Fawn Normal Ch.)
VOX^® AC30 (Fawn Bright Ch.)
Roland^® JC-120 2x12 CAB
Fender^® Champ^® 1x8 CAB
Line 6 Acoustic
Pete Anderson Custom
Ampeg^® SVT^® Normal Ch.
Ampeg^® SVT^® Bright Ch.
GK Gallien-Kruger^® 800RB          
Ampeg^® SVT^® 8x10 CAB
Ampeg^® SVT^® 410HLF CAB

I'm anxious to try those then!

Truth be known, there are things for which I find my old POD 2 more adequate than the POD HD. I'd be curious to test an XT

 
I have a POD X3, it was having a problem so I bought a POD HD.  I hated it, my X3 "Tones" wouldn't work on the HD and the HD effects were not as good as the ones in a POD XT and X3.  It also changed my tone slightly (lost a small amount of body).  I send the HD back and bought a almost new X3 off of e-bay. 
 
I use the POD with my pedal steel guitar and do not use any distortion type effects - mainly delay and reverb.  If I were using distortion the slight tone change would not be noticeable or an issue.
 
I have the POD Farm 2 and frequently use it with Sonar.
 
 

Rain
I'm anxious to try those then!

I'm dying to try the JC120 for my funk/Nile sound, and of course jazz tones.
Also, I've heard the Pete Anderson is great - AFAIK it is a modified Blackface amp of some kind.