Actually, yes, Zan. In a system I have proposed, the buddy list would become home to these groups, and you could have as many as you wish. They would be helpful in RP as well. Perhaps the buddy window would even be have is own limited chat interface. (limited so that it is not used for main chat)
As for the 'layered' guild system used to promote RP, it should be more realistic, making new folks see the difference from other games right away. Different types of guilds could be created in a process similar to Character Creation. The types of 'guilds' would dictate what your guild can do, and who can join in what capacity.
The problem is that guilds don't really matter to the game as it is.(which will change in time) I would like something more like the following.
True Guilds (merchant and trade guilds) would be top of the food chain with the most power. They are the -only- group that would actually be called a guild, and would get a special 'badge' (label color). They would get better deals from the NPCs, and even have the ability to influence NPC prices for non-guild members. Joining such a guild could also get you access to restricted places such as the winch. These guilds would very -very- hard to start, and take a long time.. The roleplay value in them would be high. They are awarded guildhouses without the need to buy one.
Parties. This is for those political 'guilds' that want to change the government. They would be easy to start, but would require a lot of effort to actually give them any power at all. They would have some chance of influencing Law (for when a law system is put in place).
Organizations. This is a catchall for non-trade, non-party 'guilds'. Organizations can be granted 'power' by True guilds and Parties, or through GMs.
Houses. Just for Lady Purrdy.
These groups are granted certain rights -after- they have established proper background and linage.
Groups. The buddy list groups. No label. No special powers or rights, and can not buy a guildhouse. If IC, these would be used like clubs.
The above system would create an enviroment in which new folks can join non-RP groups, but will be able to see the infuence of the other types of higher groups.