Hi, Rob -Geez... are you even 16 yet? When's your birthday... we'll throw a party in the lounge for you. 
This site is going to be great! I love the top graphic and the general layout and colors. The first problem, though, that strikes me is having the word advertise in three places. It detracts from the information of the site and makes the viewer feel like it's main purpose is to gain advertisers. The one above the advertisement you don't need. Keep one link. Consider changing the wording a bit on the text one... "for only pennies a day" tells the viewer you are interested in gaining sponsorship. Try to put a twist on it so it sounds like you are gaining more pertinent information. Maybe something along the lines of:
Mount Desert Island merchants: <link> sign up here </link> to connect with the people visiting our area. (no background color on the link - it has good positioning on the page and doesn't need the extra draw; my preference is left aligned)
On the merchant index:
DiscoverArcadia.com guides visitors in planning their trips to Acadia National Park. We can provide you with the means to connect with your customers. The Discover Arcadia Merchant Network enables you to advertise and have a web site of your own at discounted prices.
Instead of bold, use a different color to highlight... the viewer will automatically finish reading the "discounted prices".
On this same page, have a table that's three cells across with a Standard, Advanced, and Premium breakdown, then a simple form under it for them to fill out for more info. What you have is very detailed, but it's a bit much for me to read let alone someone who knows nothing about this. Suggested:
Discover Arcadia Network Partners receive links in related articles, at DiscoverArcadia's discretion, and a basic listing with a link to your site. If you already have a web site, click here for banner advertising rates.
Standard:
- Custom 5 page site.*
- www.yourname.com**
- 3 updates per year.
- Dependable site hosting.
Advanced:
- Custom 10 page site.*
- www.yourname.com**
- 6 updates per year.Dependable site hosting.
- Optimized for search engines.
- Search engine submission (does not guarantee acceptance)
- Limited banner advertising in DiscoverArcadia.com's Island Shop.
- 10% off additional banner advertising. <maybe go 20% off or more - set normal ad rates higher to give the higher discount and make this more attractive>
Premium:
- 10 page site - secure ecommerce package.*
- www.yourname.com**
- 6 updates per year.Dependable site hosting.
- Optimized for search engines. (does not guarantee acceptance)
- Limited banner advertising in DiscoverArcadia.com's Island Shop.
- ..% off additional banner advertising.
*additional pages $30/each
**succintly describe whether this is included or they are responsible for renewals.
**Additional updates and changes are only $18/hour for all Network Partners.
- Standard fee is $25/hour for work on Advertiser sites not under contract.-
- On each plan, build a sample site and link to it so they can see what might be included.
- Just set up the emails as needed. If they don't realize they'll be having an email address the same as the domain, this will just be another "extra" that will keep them happy along the way.
- Be careful with adding message boards or guestbooks, since nothing is worse than having these with infrequent entries... and you'll be wanting the DiscoverArcadia forums to be the place people return to make comments and add questions.
One more note:
On the home page, instead of "eat a Lobster", try: How to eat our world-famous Maine lobsters. (world-famous, delicous or whatever... just something to simply describe how great they are
)
Linda
ps - All just suggestions; take or leave whatever you like. I have a couple of my own area info sites that desperately need a redo and I've had something like this in mind. Thanks for the inspiration to get back to work on them. 
[This message has been edited by LB (edited 02-23-2001).]