Sushi + Wine: Good Idea?

Yes, yes and yes.

If you like Sushi rolls, give sparkling wine a try.  Some can be a bit too harsh (over-eager bubbles).  Prosecco (Italian Bubbly) is normally a good bet.  Try Zardetto Prosecco ($14)

If you like it raw (i.e. Sashimi), try an aromatic white like Riesling, Gewürztraminer or Viognier.  Three to try:
1. Trefethen Estate Riesling ($18-$20)
2. Trimbach Gewurztraminer ($15-$20)
3. Yalumba 'Y' Viognier ($10)

One to splurge on:  E. Guigal Condrieu ($40) - the original Viognier-based wine from the Northern Rhône valley in France

If you or one of your dining companions is a red-only person, keep it light and crisp.  Try Pinot Noir or a Beaujolais Cru (higher end Beaujolais).  Two suggestions:  Brancott Pinot Noir ($11), G. DuBoeuf Moulin a Vent Beaujolais ($12)