Idea:
As there are more than 2000 characters @ TomeNet, it would be interesting to add "Ladder" — scoreboard that keeps track of experience. It could be demonstrated at the website and its big honor to be there at first places.
"Ladder" - list of alive charecters sorted by experience amount (TomeNet already have "highscores" http://www.tomenet.eu/scores.php with list of dead heroes).
While you character in Ladder you could compete with another players constantly in-real time (in contrast to "highscores" where your character showed only when he is dead).
Why ladder is fun?
1) its a competition ---> new emotions: venturous hazard, gambler's high, excitement
2) its a new goal for players - stay alive as long as possible (you don't need to die, so everyone would know about you)
3) its good for casual and new players (like me) who didn't beat Morgoth and don't have their names @ "highscores" (may be it would never happen

4) it give possibility to watch over another players progress (betting gold who would survive

5) and finally its perfect motivation to achieve something
For example:
It would be great to see that my 32 lvl character at 919 place.. After I play one day more he would become 896. Its good stimul to continue playing, to have some competition with other players.
Types of ladder could be similar to game mode:
1) Normal (3 lifes)
2) Unworldly (no ghost)
3) Everlasting (ressurection possible)
4) Hellish
5) PvP
6) IDDC
7) IDDC Hellish
8) IDDC PvP
9) Overall (all modes mixed)
It gives another feature of ladder - to give people motivation to try another game modes - if there are not much players even new player could compete to be in top 10, for example.
Other characteristics:
1) Ladder size. There could be minimal exp quality to get to ladder (so fresh lvl 10 characters woudn't be there).
2) Ladder refresh its state every day (or more often - its depends at server resources and volume of data).
Optional stuff:
1) Make existing "highscore" rating bigger
2) clans ladder. if there would be possibility to create a clan, it could be interesting to have a competition between them (criteria: exp summ of members)
3) add possibility to look at character inventory or add comments (as there http://angband.oook.cz/ladder-browse.php?v=TomeNET )
4) Another variations of ladders:
- classes and races filter (for example, who is the best Maia in TomeNet? Or paladin? Ladder give you such answer).
- who killed most amount of monsters? Who is the Great Orchunter?

Please, discuss!