There are quite a number of issues in your question, I will answer several based upon the information you provided:
I am not sure what "....." may represent. If this is a name or region, you are not necessarily afforded much protection.
WA state TM registration is a $65 filing fee and the federal TM registration is $275-$325/class filing fee. It is strongly advised to have an attorney handle a federal trademark registration.
WA registration is not examined, outside of doing a "knockout"...
There isn't an easy answer with the facts that your provided. A common law or state trademark wouldn't [necessarily] extend into Washington. However, a federally registered trademark would create an issue for you if, and only if, your mark is likely to cause consumer confusion with the trademark holder. A trademark attorney could evaluate this and provide an solid opinion without spending a great deal of time or money.
Under some circumstances, you are permitted to use a trademark in a domain name to refer to that trademark's good. This is called fair use.
The 9th circuit (which includes Washington State) looks at the following three factors when determining a nominative fair use defense: 1)the product was readily identifiable without the use of the mark, 2) the mark was used more than necessary, or 3) a one claiming fair use falsely suggested a sponsorship or endorsement by the trademark holder.
This really depends on the types of agreements that are in place. If the manufacturer is bound by a confidentiality agreement and your friends are are also bound by a similar agreement, then there has not been any public disclosure.
The lack of a federal trademark registration does not preclude you from using it in commerce. However, it is important to understand why it was denied. You may still be liable to other parties for trademark infringement and/or trademark dilution.
You should be fine. It is possible, yet extremely unlikely, that one could patent a recipe, or the final product. This might be slightly less unlikely in molecular gastronomy (think: El Bulli).
One could own the copyright on the written words of the recipe and picture of the final product but this will not preclude you from making and selling the useful product.
For additional answers, please provide said baked good to my office.
Patent pending means that an application has been filed, but it is not a term of art. I am assuming that you filed a provisional patent application? And I am assuming that your updated application is just a second provisional application that may encompass the first in addition to improvements? If this is the case, when the first one expires, you will lose that filing date and the orginal application will be gone. It will not be discoverable by anyone in the future.
Also, if you are filing...
Trademark protection of the space needle is very interesting and somewhat unique. Ordinarily, one perspective of a building may be registered as a federal trademark. However, what makes the space needle unique is that it looks the same from all angles. Therefore, the space needle is protected under federal trademark law no matter what side is depicted.
However, using a city skyline as a whole, is not necessarily illegal in trademark or copyright law. In this regard, if the space needle is not...
If you are the photographer, you own the copyright on the photo. You can send a DMCA takedown request to the ISP of the website. This is the cheapest and easiest option.
You (or a lawyer) can also send a cease and desist letter directly to the website owner. If the copyright is timely registered with the Library of Congress (within 90 days of publishing), you can potentially receive statutory damages and legal fees in a copyright infringement case in federal court.
Finally, if there is a...
If you are intending to proceed to litigation, a local attorney is a better option because a federal claim can be brought in this jurisdiction. You will want to seek an attorney that is already admitted into the U.S. District Court for the Western District of Washington.