I had the exact same experience with Lenovo this past summer and am just as disappointed,
the only difference with me was that almost everything in my laptop was no good so it took more then four months for me to get my laptop back because of the same 'they had none in stock'.
It took me about 20 phone calls to the point of almost threatening the person i was talking to, i knew it wasn't there fault but when ur a poor student like me and you pay so much for a supposedly top of the line laptop right out of your pocket it is unbelievably frustrating.
Two months into the whole ordeal they tried to say that there was a major spill on the laptop which i would bet my life that no such thing happened however i have heard they are having much trouble with trusting these spill inicators.
Finally i had my laptop returned to me after four long months which somewhat pleased me however i wanted somebody to hear my voice about how unsatisfied i was and that there's no way someone who is paying that much should have to put up that, this is where i went from getting disappointed to extremely angry. I tried more then 12 times to call and make a complaint or just to talk to somebody besides a customer support person and every single time i was told that there was a complaint file opened for me but it was closed because it was reviewed, i don't know who they called but it wasn't me thats for sure!
i used to love my lenovo and now i almost wish i didn't buy it, i have found other people who have had similar experiences and then i've also talked to people who have had great experiences. nevertheless i wish i would've been forwarded to somebody who helped you out that much and was nice like that, half the people i talked to were rude "you'll get your laptop when we are done with it!!" , and thats directly quoting someone from the warranty place nearly yelling at me. i almost laugh but u may be reading something almost exactly like this in the newspapers very soon, they want the story if i decide to give it to them and the only thing stopping me is that i do like lenovo's and i don't want to be responsible for causing a lot of doubt in them but if i hear of one or two more classmates or just people in general then i will have no choice because it is simply not fair.
Thanks for reading, sorry for the length