Just for entertainment with a little bit of possible gambling?
http://forums.bukkit.org/threads/fun-mobarena-v0-87-1-become-a-mob-fighting-gladiator-818.19144/

This one could be useful for underwater cities and traps.
http://forums.bukkit.org/threads/mech-floodgates-1-2-trapdoor-water-win-818.18668/

If the mcMMO is going to be removed, i have a sugestion for replacement.
http://forums.bukkit.org/threads/mech-the-minequest-v0-52-rpg-system-with-customizable-quests-classes-and-npcs-818.8576/

This might be useful if the server will turn mostly PVP. Retractable Bridges
http://forums.bukkit.org/threads/mech-retractablebridge-v1-3-6-easy-and-realistic-retractable-bridges-556-818.10659/
Aand there another plugin which works great with the previous one. Draw Gates (that's how you say it in English?)
http://forums.bukkit.org/threads/mech-portecoulissante-v1-2-1-easy-and-realistic-portcullises-556-818.7346/

Another plugin, miht be useful for sieges >. TNT Cannons
http://forums.bukkit.org/threads/fun-mech-aimcannon-v0-5-aim-with-this-tnt-cannon-684-733-815.13568/

Another RPG Plugin:
http://forums.bukkit.org/threads/fun-mech-pwncraft-v1-06-the-rpg-pvp-plugin-740.16185/

Gambling (Another source of income):
http://forums.bukkit.org/threads/fun-mech-gambling-cards-dice-and-signs-740.15626/

Something for peopel often stuck in world holes after teleporting:
http://forums.bukkit.org/threads/fix-mech-bananachunk-v4-6-stuck-in-a-lag-hole-request-a-chunk-resend-now-with-auto-resend-818.19232/

Some jobs for bored players: Jobs
http://forums.bukkit.org/threads/econ-jobs-v2-0-1-jobs-plugin-for-minecraft-818-iconomy-4-5-boseconomy-permissions.13294/

iConomy. It's quite to play without a shop, huh?
http://forums.bukkit.org/threads/econ-iconomy-5-0-1-eruanna-779.40/

Some other economy plugin:
http://forums.bukkit.org/threads/econ-localshops-v3-1-1-fifth-avenue-economy-based-player-shops-766.17131/

So the people will remember how bad you are at this game: Tombs
http://forums.bukkit.org/threads/fun-tp-tomb-0-5-8-make-people-remember-you-after-your-death-818-permissions-iconomy-4-5.14819/

Useful in case if someone has something forbidden (or is trying to hide something): Item Detector
http://forums.bukkit.org/threads/mech-fun-itemdetector-v1-1-an-item-detecting-gate-818.14416/

When i mine, every 2-3 blocks, blocks i mined reappear and i have to mine them again.

So, shoudl i update to 1.6.6 now, or wait so i don't have to downgrade later?

I have looked for a plugin which would be helpful for a lot of miners (such as me). It's basically about removing need to place torches everywhere, instead the light now is following the player. It might be helpful due to the latest changes to the server.
Here's the link: http://forums.bukkit.org/threads/mech-portable-torches-v1-04-portable-headlamp-lighting-740.9601/


Here's another one: http://forums.bukkit.org/threads/mech-misc-seasons-v1-3-1-add-seasons-to-your-server-multiworld-special-days-803.15183/
It's about ability to make seasons and special days, for the RP sake. There could be for example Noobscraft Creation Day.

PS. Is server keep running on Version 740, or is it frequently updated? I just want to know to do not put in incompatible plugins.

Damn It....
All i can do is wish you luck mate, hope you and your house will survive it.
Damn, a Tornado....

took the bottle

then it burned