Paul,
There is no ban or prohibition on you posting links to your own pictures on any website, forum or email list, in fact I actively encourage it.
It gets your picture and name out there, it also brings people to IrishAirPics.com / WorldAirPics.com where they can browse around the website looking at more of your pictures or other peoples pictures.
A direct link to your picture is displayed on the photo page, feel free to send the link around, there is a link displayed above your picture and more links are available by clicking on the link icon (chain link icon).
Now the trick here now is not to spam people, for example, I wouldn't send an email to the mailing lists with when every one of your pictures are added to the site unless the picture is newsworthy or some one was asking about, basically play it smart, don't put people off looking at your pictures.
Tony, everyone on the website is an angel, I'm just letting them know I'm watching!
Regards,
Frank.