I'm giving here the way I can see records being beaten, from the most likely to the most unlikely. I didn't feel like creating a new topic for this, but this one should be quite appropriated. I didn't rank 7 levels due to the fact I can't have any precise opinion on the possibility of them being beaten. I divided them into categories to help the readability, but one should rather see that as a continuous ranking.
More probable:
Caverns 00 1'42
Frigate 00 1'11
Statue A 2'20 (Eddie

)
Egyptian SA 0'47
Surface 1 A 1'03 (Go Dave!)
Control A 3'59 (Go Boss!)
Dam 00 1'59
Caverns A 1'03 (Go Luke!!)
Seems possible, but tough
Egyptian 00 0'47
Surface 2 00 1'29
Jungle 00 0'58 (2 second difference with SA while the level is "the same" (don't get me wrong here) make me think 58 will be beaten)
Surface 1 SA 1'50
Surface 1 00 1'50
Silo 00 1'30 (Goose?)
Bunker 1 00 1'07
Surface 2 A 0'51
Would be
Silo A 1'04
Facility A 0'46
Archives SA 0'55
Archives 00 0'55
Streets SA 1'56
Streets 00 1'56
Runway 00 0'37
Depot 00 0'50 (Wouter told me he has already failed 49)
Cradle SA 0'36
Unlikely:
Bunker 1 SA 0'23
Depot SA 0'43
Statue 00 2'19
Statue SA 2'19
Frigate SA 1'02
Bunker 2 SA 0'49
Caverns SA 1'22
Cradle 00 0'36
Seems impossible:
Runway SA 0'23
Surface 2 SA 0'54
Control SA 4'11
Control 00 4'13
Facility SA 0'55
Facility 00 0'55
Jungle SA 0'56
Silo SA 1'10
Dam SA 1'17
Jungle A 0'52
Streets A 1'13 (Goose, even with what you said, I can't see 1'12 happening)
Depot A 0'26
Impossible to me:
Egyptian A 0'46
Archives A 0'16
Cradle A 0'34
Dam A 0'53
Bunker 2 A 0'24
Frigate A 0'23
Bunker 1 A 0'17
Runway A 0'22
Unranked:
Bunker 2 00 0'58
Train A, SA, 00
Aztec A, SA, 00
For the Agent 20:00 barrier, I'd say it will be broken by the end of 2008, let's say mid November.
Also, I don't think 1:15:00 will be broken before the end of the year. Now that the train festival is finished, total time will continue decreasing slowly. I also think 1:15:00 will be the last barrier broken, and I'm joining Octo there, thinking 1:14:30 will be hard enough already to my eyes (unless a new strat is discovered somewhere).
I don't say every record is close to its max, but as humans, we're not designed to do maxed times.