You should be notified, but I think you need to click a preference in your profile (alternatively, maybe its being blocked by your spam checker).
You can pay NI in Malta as long as you are below official retirement age.
RHA - I've made a detailed post on the members only section (£ 25 pa to join, 50% to Gozo SPCA) of my experiences last month, but there is also info on the following
EU citizen moving to Malta Q&A
http://www.britishexpat.com/expatforum/malta/viewtopic.php?t=8544
this covers the following
1. An EU citizens legal rights - residency, working, students
2. what sort of residency is available ?
3. what do I need to apply for if I want to reside in Malta ?
4. do I need to apply for residency before coming to live in Malta ?
5. do I need an accountant to apply for residency ?
6. do I need health insurance ?
6.1 Do I qualify for public health cover, and if I do, what cover do I have ? Are prescriptions free ?
7. can I work in Malta ?
7.1 How much is income tax ?
7.2 How much are social security contributions ?
8. where do I apply for my residency permit ?
9. where can I get the OR application form ?
10. where do I apply for my ID card ?
11. what documents do I need to apply for OR ?
12. can I vote in Malta ?
13. buying a property FAQ
14. renting a property FAQ
15. Importing a vehicle FAQ
16. What's the procedure for importing/exporting a pet ?
17. Can I use my driving licence in Malta ?
18. Long term residency permit