Hi there!
Just read across the suggestions here and missed the following great fresh bands/solo artists:
FIGHT LIKE APES (thrilling vocalist->MayKay)
GRAND POCKET ORCHESTRA (full power and fun)
LAST DAYS OF DEATH COUNTRY(-> Patrick O'Brien, mastermind behind, they'll go far.)
CRAYONSMITH (nice song-writing and a lot of xylophone)
GIVEAMANAKICK (a short-term successful noisy, drumming strumming 2-guys-project that only recently split up, god knows why)
WINDINGS (a side project of one of them, now upcoming)
RED DANCERS COMETH (just dark and sexy)
REST (dark)
WALTER MITTY AND THE REALISTS (weird in a good way)
VERTIGO SMYTH (melodic and not mainstream)
MEADHBH BOYD (mark that young woman and multi-instrumentalist)
BREANDAN O'RUAIDH (now aka ORMY; formerly going from jazz to experimental, now back to his folk roots, but always good for a surprise)
THE LONELY SCHIZOPHRENIC (Have sex with Panda bears and others, mourn your dad or alternately, your cat...)
HOORAY FOR HUMANS (just good music)
For more impressions on the recent Irish music scene check out
www.balconytv.com -> Made large by founder Stephen O'Regan and his witty colleagues. They are broadcasting unplugged honest handmade music acts from a balcony in Dame-Street, Dublin

)
(By now, there is a side-project in Hamburg, presented for the German music indie scene, but sadly it's not half as good and charming, I must say.)
These are the hints that come to my mind right away; the bands I mentioned mostly derive from Dublin, Cork, Waterford and Limerick - whilst I live, funny enough, in...Berlin and only know them from the internet and some lucky collaboration when doing a TARA-CD (Songs For The Unsung, soon available again).

)
They all are on MySpace, of course (google out), so you can get an impression, and their range goes from fun electro punk or dark to alternative, singer/song-writer style, comedy and experimental: Some of them already found grace in the eyes and ears of Phantom, such as GAMAK, WINDINGS and FIGHT LIKE APES, yet some of them are still waiting to get what they deserve...So listen in and enjoy!

)
Cheers -
Nic