I'm just hoping the 2008 series, tentatively named "Heroes", will bring back the quality of Beast Wars/Machines, since it will be the first cartoon after them to be written in America. I couldn't stomach any of the recent 4 cartoons (Robots In Disguise, Armada, Energon and Cybertron) because of the crappy Japanese direction.
As for the various lines, I think it's pretty easy to sort them out when explained properly:
-Main toy lines:-
Armada, which was followed by...
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Energon, which was itself followed by...
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Cybertron, which will in turn be kinda replaced by...
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Classic, which is kind of a filler line, intended to last until the movie comes out and only 2 or 3 waves of releases are planned.
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Universe (which has been over for a long while) was also a filler line running in parallele with the main lines, and consisted exclusively of repaints to meet the increasing demand for toys that wasn't satisfied by the main lines.
-Collectors toy lines:-
Alternators consists of realistic/licensed car modes updates of classic G1 characters with lots of articulation
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Heroes Of Cybertron is made up of cheap and miniature transforming figures from the Cybertron line
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Titanium offers transforming die-cast statues of popular characters, including some exclusive to comics and cartoons
It's also most likely that the movie line will be the main line for 2007, with "Heroes" being the main line for 2008.
I hope that made things a big clearer. It should also be noted that there never was this many Transformers products offered at the same time, which is hopefully indicative of the overall health of the franchise
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"With the first link, the chain is forged. The first speech censored, the first thought forbidden, the first freedom denied, chains us all irrevocably." [...] The first time any man's freedom is trodden on, we're all damaged. - Captain Jean-Luc Picard
B*tch, meet reality. Reality, meet b*tch. - Me