Wireless Authentication & Security using 802.11g

[nyne]

I am currently in the process of building a Gentoo box to assume the role of both firewall/gateway of a small home lan, as well as wireless access point. The goal would be to secure the wireless lan, since there is only 1 wired node in the network, which subsequently is a Gentoo box as well. the network consists of 2 notebook's 1 gentoo, 1 osx panther.. and 2 windows nodes... one Millenium edition, and one using XP professional.. I currently have a befw11s4 linksys wireless router/ap/etc in place, but, for a number of reasons it falls short. (lack of decent security, only supports wep)

I currently have a broadcom (belkin) 802.11g using Ndiswrapper, and it's windows driver working on the machine, but have not configured hostap support. Would i still be able to run in Ad-hoc mode, even if i was unable to use "Master"?

Is there any gentoo specific documentation on setting up secure wireless lans using Ipsec with the 2.6 kernel? I have already found some very generic documentation, but am still trying to get some more research together

granted i get all of this working properly.. would radius be the proper way to authenticate users, or would ipsec facilitate this?

i'm basically looking for howto's, documentation, advice, etc.. I would really like to get rid of the linksys device all together and use the gentoo machine i am working with now to control wireless access, as well as routing between the cable modem, and the wireless nodes.
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