These days x64 is widely supported.
For a communications program being able to communicate with the whole world with the least effort(over 7 billion people alone, not counting the all kinds of devices) is more then a must.
Proper IPv6 support e.g.
There are already various free 64-bit IRC programs, either solely irc based or with the functionality in it.
There are free ways to compile a 64-bit program.
Using 64-bit programs for some time now, a well written 64-bit program has more then speed advantage.

Best regards to Khaled from an early mIRC'er

Last edited by M1RCer; 02/12/11 01:57 PM.