Crazypanda, didn't want you to go unanswered. It varies from area to area. A lot of PCTs just diagnose and that's it. That's what happens here. We, supposedly, have the gold standard diagnosis service, but then that's it. They have no funding for support.
If he said he will contact everyone involved. It may well be that, if he needs it your ds will get some help from an occupational therapist (OT) and/or Speech and Language Therapist (SALT). You could call the Paed's secretary and ask what the usual process is, they're usually really helpful.
I noticed you are meeting with the SENCO next week and the SALT is also meeting with him/her. So it sounds like at least they are starting to sit up and take notice. Don't be surprised if you have to stand your ground and demand the right support for him though. He should be placed on the School Action Plus (SA+) part of the school's SEN Register as there are other outside professionals involved in his care (Paed, SALT) and should have an Individual Education Plan (IEP) which is usually written by the SENCO after meeting with you and probably/possibly him. It will set down some specific targets for your ds, how he is going to achieve them, what support the school will give, how they will be measured and when he should have achieved them by. This is designed to help you and them monitor his progress and make decisions as to when and where additional support is needed.
There's some basic information about the process on the direct gov website here.
They should also be bringing in the ASD Inclusion Team, even if its just for advice if he doesn't need much support. So it may well be worth asking them if that's going to happen at the meeting. (My school didn't do this and I ended up contacting them myself. They are now involved with ds and several other children who have ASD in the school, despite not having contact with the school for a very long time previously.)
If its emotional stuff he needs support with, its usually CAMHS that get involved there and you can get a referral to them via your GP, but there tend to be really long waiting lists as they are overstretched in pretty much every area.
Specific emotional things relating to school/education, eg school refusing or anxiety relating to problems at school such as bullying, can be addressed by an Educational Psychologist. Again, your school is able to bring them in, but in my case I had to do it myself (are we sensing a pattern here? 
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Have you read any books about Aspergers yourself. I can highly recommend Tony Attwood's Complete Guide to Aspergers and Brenda Boyd's Parenting a Child with Aspergers and Appreciating Aspergers Syndrome. The first is often recommended when children are first diagnosed as its a comprehensive guide to Aspergers. The other two are written by the parent of a child who has Aspergers and I found them very reassuring.
Hope I've helped a little. It is a lot to get your head around at first, but it does start to make sense I promise you. Twelve months ago I hadn't a clue, now I can kick butt along with the best of them to get my ds the proper support.
There's loads of support on here, but its usually best to start a new thread if you need to know anything specific as the board moves quite quickly sometimes and the last few posts on a thread are sometimes missed.