If Access hasn't gotten back to you, go in and have a chat to them yourselves. If you don't have any luck, let me know (via PM or my e-mail is in my profile) and I'll see what I can do - I know a few people personally and may be able to pull a few strings.
With regards to your questions about the costs and venues, I'll leave that to one of the other senior members to reply, as I never attended the Maths seminar (as I don't do Maths)
I can give you some figures for other seminars I have attended though. The edassist lectures at Sydney (English = useful. History = bloody hopeless) were $30 each for a 2 hour lecture. The Con ones were $100 for 2 days.
The problem with many of these seminars is that, as there is no prior knowledge of what the candiature actually requires help with, the seminars are too broad spectrum therefore not providing the correct amount of depth. Question times are often cut as well, which is pointless, as much of the benefit of a seminar would be to discuss things with students studying the same course material as you.
Perhaps the Bored can have a sort of Advance Poll for people who are going to be attending the seminars, with specific areas which people can nominate as problem areas (forum password locked for only those who have applied and paid for seminar???) so that the Tutors can then prepare seminars with that in mind.
Example. 100 people apply for Seminar on Advanced English - Module B Critical Study of Texts - King Lear. 80 of these people would like to specifically talk about how to create ones own interpretation of King Lear. Ie. how it can be applied to their context, how previous people have devised readings, how to alter other readings to suit your own.
So instead of running a seminar talking about Themes and Techniques as demonstrated in Freudian and Marxist readings, the tutor will know that they have to create a seminar about personal readings and how to apply ones own context and what sort of things to consider. etc. etc.
Perhaps thats too specific... but its an idea.