Any thing can be made RC
The Tamiya kits work really well.
Here are some other kit examples
Revell North Sea Trawler
http://www.rcgroups.com/forums/showthread.php?t=173262
Then New Revell Queen Mary II 1-400
http://www.rcgroups.com/forums/showthread.php?t=317050
The Lindberg Fletcher was designed to convert to RC, but can be a little over weight.
http://www.rcgroups.com/forums/showthread.php?t=319827
http://www.rcgroups.com/forums/showthread.php?t=338744
Both the scales of the Lindberg PT boat have been converted to RC.
http://www.rcgroups.com/forums/showpost.php?p=1743023&postcount=127
And also the Lindbergs 1/72nd scale harbor tug.
Here is the new Trumpeter LCM
http://www.geocities.com/patsmodels/lcm3/
The Revell 1:144 Sea Shadow
http://geocities.com/patsmodels/seashadow/
Tamiya 1-350 Musashi
http://www.geocities.com/patsmodels/musashi/
Pat's (Patmat) web site is a wealth of information actually...
http://geocities.com/y2patmat/
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The Tamiya PT-15
http://www.rcgroups.com/forums/showpost.php?p=323203&postcount=3
Pat Tritle shows his RC Revell fire boat, Revell North Sea Trawler and Lindberg tug.
http://www.rcgroups.com/forums/showpost.php?p=1474009&postcount=122
Here is another good "HOW TO" on modifying a servo for use as a drive motor and speed control for small models like the Lindberg tug.
http://www.mhsd.org/model/howto/servo.htm
http://www.boatnerd.com/model/tug/default.htm
I truly believe anything can be made RC, its just a matter of finding the right parts.