Just to clarify, mIRC is software used to IRC (Internet Relay Chat) on any one of lots of networks. Each network has their own servers. You use mIRC (or other software) to connect to that network by way of its servers. So no, mIRC itself isnt in any danger as a result of the attacks on any network. Its the network being attacked, not mIRC.
Sadly, there isnt any way to know how long this or attacks on any other network will last. You can keep up to date by checking on the UDATE post on this forum, and by looking at DALnet's
web page and their
ezine The ezine also gives you ways you can help stop things like this from happening in a previous
issue 
