In order:
Miz and Morrison
These are just about the only tag team in existence now that would have had a look in at the turn of the century. They have excellent chemistry, both in the ring and out of it, and I don't doubt that The Miz's incredible improvement over the last 15 months or so is not soley down to this pairing, but it certainly had a lot to do with it.
The Colons
Genuine brother pairings always give tag teams a bit of a buzz, especially since the WWE has stopped making every tag team be brothers. I like this team because they have quite an interesting style, and I really think that they could get over based on their high flying springboard moves alone and be the Hardys of this generation. Maybe not, but they are certainly capable of a decent match.
Cryme Tyme
Style over substance. I don't think I've ever see them had a shocker of a match, but they don't really blow me out of the water every time I see them. They're over, and will probably be for as long as they stay face and on TV. The gimmick is something of a cliche, but it works.
Priceless
Now I think that these guys are fine, and obviously have the potential to be much higher, but I haven't seen them fight enough together. They won the titles in a shambolic way, and were used as a sideshow in the Cena and Batista feud before beating Cryme Tyme once and then losing to a slap dash team. i don't think they have fought together since as a pair.
My point is, is that until they go with the whole Legacy dominance thing with Orton as champ and them two as tag team champs, I don't think they will be seen very often as a pair after the inevitable destruction of Sim and Manu. So, they a fourth for inactivity, and would otherwise probably be second.
Jesse and Festus
This could have gone somewhere. Then it didn't. Then Jesse still did some ok promos and Festus was in the main event. Then they didn't Then it looked like Maria might make Festus normal. She didn't. Then they looked like they might feud with Miz and Morrison. Then they didn't. Then I still quite liked them. Then I didn't.
But they could still salvage this, if they have a decent way of making Festus normal. The Maria idea wouldn't have been too bad at all.
Hornswaggle & Finlay
It's a dwarf and an old man. Sounds like comedy gold, but it really really isn't. They are dull, but the kids like them so I think they probably do have a place in the division, but sahould never be contenders.
Ryder and Hawkins
In a word boring. There is nothing attractive in this team. I think they could be fine as people just to bolster the division, in the same way that they had teams like Mark Henry and d'Lo in the past. However, they are dead last because I am not sure we will ever see them on WWE programming again, I can't even remember the last time they were, but certainly not for a long while.
As for other potential partnerships, we have Kendrick and Ezeikel, Bourne and either Mysterio or Kingston, and a few others.
The recent match up between the Colons and Miz and Morrison, along with the latter pairing appearing on every brand, made me think that perhaps we would see the tag titlesd united at Wrestlemania. Just a possibility, but I think the two potential tag teams I made, along with those listed in the question could probably make for a reasonable tag division.