It's not uncommon for Apple to drop prices, but I think they normally drop on a new revision of hardware (sometimes at least), and I'm hoping they'll do that with the next rev of the mac pros, or have them all as dual processor configurations.
Couple of Mid cycle price drop links here
https://www.macrumors.com/2008/07/03/1-8ghz-ssd-macbook-air-drops-500/
http://www.appleinsider.com/article...k_and_canada_price_cuts_ipod_mini_drives.html
Back on topic.
No new mac Pro for me for the following reasons, note this is regarding the base model which I had budgeted for.
Price/Performance ratio - seems very skewed compared to the last base model (8 core 2.8), especially when the 8 core 2.8 may outperform the new 2.66 quad in some tasks, and for a cheaper (UK) price too.
Ram limitation - Only 4 slots, that's the same as my dual G5 from a good few years ago, plus it seems silly to not have at least 6 slots in their for the triple channel goodness.
GPUs - Nvidia have recently released the GTX 295, and ATI have the 4870X2 and there are rumours of the 5 series on the horizon so although the 4870 is regarded as a very good (if somewhat noisy) GPU it'll be a last gen card pretty soon, they could have at least stuck 1GB in there. Not to mention having to use a (not included) dongle to drive a pair of DVI displays. Of note my G5 included a DVI to VGA adaptor when purchased, which was handy as I had VGA displays back then.
Lack of a workstation GPU - Although I'd have no need for one many heavy users of a select few apps will.
Blu-Ray - Blu Ray doesn't mean much to me, but to some content creators having a mac based Blu-Ray option would be a dream, especially if DVD Studio Pro let you author Blu-Rays, it does seem a little backwards that macs, which are often seen as the creative platform of choice, don't do Blu-Ray, no matter if you think that Blu-Ray is doomed, or the best thing since sliced bread there should be an option.
eSATA - Now the Mac Pros do have features that I may not need, but which others couldn't do with out, likewise many may not need eSATA, but how difficult could it be to implement a couple of ports in the back, so that those who do use eSATA drives don't have to use a PCIe slot, which may otherwise be used for something else.
If I had money to burn, or my landlord didn't mind going without his rent for the next six months I would be tempted to grab one of the higher end 8 core models. But I don't and my landlord would mind, so I'm stuck with the hackintosh option.