Hi
Hope you dont mind - but I just spotted a couple of things in your FAQs which are incorrect.

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(no 5)
TalkTalk is now owned by CPW. (They never were owned by tiscali, but at one point a few years ago either resold tiscali products/used tiscali backhaul services).
Whilst TT have for a long time blocked/shaped p2p (and other protocols!), since last month (apr 07) there is strong evidence that p2p is blocked between 8am up to midnight. Off peak is still speed restricted.
Some success can be achieved by using encryption, LW seems to fare better than say uTorrent.

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(no 16)

Ive used LW for several years on a Plusnet account and not had a problem connecting.
Test http://www3.limewire.com:6346/ results in "Your test worked!!"

PlusNet dont use port blocking for p2p. They use ellacoyas which are too intelligent to be fooled by a simple change of port.

Yes they do shape p2p traffic - but how much shaping depends on which account type you are on. The ch*apest account is heavily shaped and not recommended for p2p, whilst PAYG should give you line speed. Time of day can also affect p2p speeds as during peak-time the ch*aper accounts will see slow downs, but should still be able to connect.
Off peak should be fine for all accounts except the £9.99 one which is throttled to 256kbps.

Now some information which could very well be related to the post that you have high-lighted in 16 on your FAQ?
PlusNet accounts can be configured by the main account holder whether to allow p2p or not. This can be changed by the account holder in the control panel >> Connections >> Surf
(Safe Surf) at https://portal.plus.net/surf/
The full list of configurable ports are available from that page
If the account holder has activated "Safe Surf" then 6346 is one of the many ports that can be blocked.
The option is supposed to be there for say basic parental controls, but because it does block on port number ranges then, it wont stop a teenager determined to change the port no.
PlusNet use this disclaimer:-
"Please note: We can’t guarantee that Safe Surf will block all Peer-to-Peer and USENET traffic. Some Peer-to-Peer applications can be set to use a different port if the common port is blocked."

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(no 2)
Tiscali UK
Whilst the faq isnt actually incorrect - some more info - P2P during peak time hours is very heavily "discouraged", and if you do, you could find all protocols being slowed down and your connection heavily throttled for several days. :/

[edit]

Not sure why ch3ap has been caught in the swear filter?
***** = least expensive.