Any good sites or tools that estimate future Difficulty?

[Kuroth]

Thanks!

[KSV]

this is a good Q. . . lets see who has the answer

[J35st3r]

For speculation see https://bitcointalk.org/index.php?board=81.0 (probably as good as you'll get)

For calculation see http://coinish.com/calc (use expert mode and plug in just about any values you want).

And for ASICs see https://bitcointalk.org/index.php?topic=209750.0

[Eva Braun]

good question havent been able to find one yet