As well as throwing my hat into the ring along with many others, in terms of some financial contribution to the Forum operating costs (and also of course for virtually the same reasons that others have voiced) its also probably worthwhile mentioning the following points at this juncture too :
Firstly, tigertiger is correct in that potential Forum members would view paid membership as a NO NO! (Sad to say - but true!) :-\
However, the contribution would have to be a set amount to be paid equally by all members - otherwise, imagine what the Forum would become if it was funded from a few existing members! Clearly, Forum members who were only able to contribute a small amount or were unable to contribute (for whatever reason) anything at all, would feel themselves as second-rate members. On the other hand, members who had contributed the most... well, we're all human... you don't need me to explain the pitfalls here. Surely we don't want to have a 'top-dog financial hierarchy' - its bad enough being 'promoted' for the number of postings!!
So in my view, Forum membership has to continue to be perceived to be equal... otherwise it will simply just decline and fail - and I'm certain Martin is aware of that fact.... eg how difficult do you think it would be to ban someone who has a paid a fortune to air his views on the Forum...? Mmmmmm!! Extremely dodgy!

Anyway, worth thinking about - but I'm all for sending 'something' though as necessary (but I wouldn't be prepared to mention the actual sum involved bearing in mind what I've said above!) :-[
But as others have already said, we also need to hear what Martin needs from us..... Cheers, Brian