Des Voh
Johnny Malone
I feel a bit like a drug peddler, I tell nearly everyone I know who even has a passing interest in Celtic music to go to that sight.
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Do they have classic Celtic too?
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They have quite a few covers of classic Irish folk tunes like Muirsheen Durkin, McAlpine's Fusileers, Wild Rover, etc. Many of the bands follow the Pogues style of playing with all traditional instruments but playing at an increased tempo.
If it's classic Irish folk you want check out: The Clancy Brothers with Tommy Makem, The Dubliners, The Chieftans, The Irish Rovers, (All bands fromt he 60's and 70's) they are pretty much legendary in the Irish Folk scene (at least the first three bands are.) Also for good Scottish folk check out The Corries.
EDIT: Some good modern classic Irish bands are Gaelic Storm and Celtic Woman.