Could someone please point me towards any websites for bus/air timetables for travelling between these 3 locations. I am travelling by bus to Lake Tit from Cusco and then want to move relatively fast from there to Lima via Nazca. I also wouldn't mind being talked out of Nazca(in early December) so please tell me how it is likely to be fog bound, boring and a scary flight!

We rode lots of buses, and both paid the most and received the worst service from Ormeno. Would not recommend them. We could have just gotten unlucky... Flores and Soyuz and others do the same routes for a quarter of the price. They offer all the same comforts as Cruz del Sur and Ormeno, however I'd be a little more careful if using them for an overnight.
As for the Nasca flight, we loved it. No fog, the cessna ride was great, and the lines are very visible. The planes turn somewhat hard, but there are no drops or flips or anything crazy so the people complaining about getting sick must really have motion issues. A little hard to get the photos, but the experience I'd say was a positive one. However Nasca, the town, isn't very nice so I wouldn't stay very long, the lines are by far the best thing there. But go for it!
Thanks to all of you(except for not talking me out of Naxca!) - particularly halfperu for the links.

I saw a bunch of videos on youtube about Nazca. The lines do not seem very visible at all and friends told me that the pics you see about the lines are enhanced so you can see them better. Comments?

It's easy to see the lines. We went with Alegria tours (who also operate a hotel) and it was an enjoyable ride, the pilot was friendly. i thought it was worthwhile, though not terribly exciting, mostly because it was at the end of our trip and we were a bit worn out. We rode San Luis from Cusco to Puno (10 pm-5 am) and it was an awful ride and the door to the toilet was broken. Julsa we rode from Puno to Arequipa, comfortable, but 1.5 late (ended up being almost 7 hours) in arriving. There are typically buses departing with one company or another every 1-2 hours from early in the morning to late at night to/from major destinations. Soyuz was nice enough and we took that from Nazca to Lima. Cruz is very nice, we took it overnight from Arequipa to Nazca, but they actually arrived early. San Luis was our worst experience - but really the only bad bus experience we had. Soyuz, Julsa and San Luis (in that order) were progressively nicer and all comfortable and clean.
