I might be. I've been running a Realms game on rpol for awhile, so it would nice to be a player. I'm completely unfamiliar with the Rolemaster ruleset, though; what's it like? And what year are you setting the game in?
Doggedly converting 3e back to what D&D should be... Sigh... And now 4e as well.
Rolemaster is a D100 game. You have your skills add them to the dice roll and 101+ = success, for the most part. Combat is centred around 'criticals' that give descriptive results for each blow if it lands. Magic is 'powerpoint' based so you can cast as many spells as you have power for rather than forgetting the spell as soon as you cast it.