Why did you register Maritime.im? The keyword maritime has sold 4 times, all in .com, all in the range of $2k-$3k. If the keyword hasn't sold in any extension other than .com and even then not for very much, why would you spend $5 regging the .im? To me, it's like getting a $5 bill and burning it.
Let's imagine there is a company with an interest in the keyword maritime, what are they gaining from buying it in .im? I'll tell you what they are losing;
1) It will be a 2009 registration and search engines give preference to older continuously regged domains
2) Search engines will give .im domains a lower relevance than gTLD's on non Isle of Man search results because of the geo ending.
For those two reasons alone, no developer with any SEO knowledge would ever develop Maritime.im.
From a branding angle, "Maritime.im" makes no sense whatsover. The phrase "Maritime im" has 818 Google uniques, "Maritimeim" has 27.
For alternative extensions to stand a snowball in hell's chance of making any progress, they have to add something to the keyword, either to complement it or make it brandable. So for example, I regged Marine.pro in November 07. It wasn't a play on the keyword Marine, it was a play on the combination of the keyword Marine and extension Pro. "Marine Pro" has 57,900 Google uniques.
Take another of your registrations on this thread. Cargo.im, I regged Cargo.pro, again in November 2007. "Cargoim" has 264 Google uniques versus 4,730 for "Cargopro". My registration of Cargo.pro wasn't just for the keyword cargo, like Maritime it's not that lucrative, if you look on dnsaleprice, there have been 10 sales of Cargo keyword domains, 9 out of 10 were .com with the highest at $10,000, with just the 1 alternative eCargo.eu at $1,100. I regged Cargo.pro because Cargo and pro rhyme so combined with the Pro branding suffix, it makes it brandable.
The odds of making money out of alternative extensions are very slim so you should pick a keyword and extension pairing that makes logical sense, adds value, and might be more preferable to a buyer than the usual .net and .org alternatives to .com.
I'm a fan of alternative extensions and not just the extensions I've invested in; .info and .pro, I can also appreciate the branding appeal of certain keywords in .tv and .me. However, meaningless ccTLD's with "it could mean" hype like .cc, .ws, .im and so on which rely purely on their keyword are destined for the dustbin. They only have value when certain keywords are scarce but with 100's of extensions floating around and 100s more on the way, the only wheel of fortune being span when people hand over $4.99 to reg domains like Maritime.im is in their head.