Thanks a lot baikal3, that's very interesting!
What you're saying is that there's actually no point for me to plan a special travel that will "break" the absence into chunks that are shorter than 6 months, becuase my employer and address information in this year will probably be interpreted as evidencing that no "continuous residence" in the US was established... that makes sense.
No, not exactly.
It is still a good idea to make several trips to the U.S., separated by relatively short intervals, before you actually move here in June 2015.
For one thing, you have to worry about preserving your LPR status (which is a separate naturalization requirement from continuing residence and physical presence). With one long absence (especially if it is over 6 months), a CBP agent at the port of entry might question you more closely and you might get into trouble. What you are doing now is not really consistent with maintaining an LPR status.
You don't own/rent a house or an apartment in the U.S., you don't currently have a job in the U.S., and you don't have any immediate family members in the U.S. But you do have all of these abroad. Nor have you actually resided (in the sense of having your primary home) in the U.S. since getting a green card. All these factors put you in a danger zone in terms of having a valid LPR status, in my opinion.
Even if you don't get any problems entering the U.S., the issue may still come back to bite you at the naturalization stage.
When an N-400 application is considered, the adjudicator will look from scratch at your compliance with having maintained a valid LPR status since getting a green card. The adjudicator may determine that you have not actually maintained a valid LPR status, in which case your application will be denied (although the green card is usually not revoked in such cases), regardless of the situation with the continuous residence and physical presence requirement. There have been cases of this sort reported in this board, where people are put in a paradoxical situation. Their green card is not revoked, but they are, in effect, ruled permanently ineligible for naturalization (unless they give up the green card, go abroad, and re-immgrate by getting a green card again). You don't what to end up in this kind of situation.
On the other hand, it is also true that many UCSIS adjudicators are fairly lazy and not very competent, and check compliance with the continuous residence and having maintained valid LPR status requirements in a very perfunctory way. So you might actually get away with having your N-400 approved if you apply for it 5 years from getting your green card, assuming that you don't have any absences longer than 6 months.
So there are good reasons to visit the U.S. several times, at relatively short intervals, before June 2015. If you can afford to rent an apartment or a house in the U.S. now or a little later (but well before June 2015), I'd consider doing that too.