Decided to play some PLO today, give myself a break from grinding the stud tables. Probably about the 5th or 6th time I've ever played the game. Anyway, hows my driving?

------HAND 4------
Game #1909497253: Omaha PL (US$0.25/US$0.50) - 2006/03/17 - 15:55:48 (BST)
Table "Humberto" Seat 2 is the button.
Seat 2: slippers (US$90 in chips)
Seat 4: cs2275 (US$12.05 in chips)
Seat 5: Astaroth (US$41.90 in chips)
Seat 6: Stattoman (US$8.75 in chips)
Seat 7: Mortedo (US$55.90 in chips)
Seat 8: Go_Hard (US$30.40 in chips)
Seat 9: Toby99 (US$68.95 in chips)
Seat 10: eekie (US$58.35 in chips)
cs2275: posts small blind US$0.25
Astaroth: posts big blind US$0.50
----- HOLE CARDS -----
dealt to Astaroth [ ]
Stattoman: calls US$0.50
Mortedo: calls US$0.50
Go_Hard: calls US$0.50
Toby99: calls US$0.50
eekie: folds
slippers: folds
cs2275: calls US$0.25
Astaroth: checks
----- FLOP ----- [ ]
cs2275: checks
Astaroth: bets US$3
Stattoman: folds
Mortedo: calls US$3
Go_Hard: folds
Toby99: folds
cs2275: folds

I bet pot with top pair-bottom pair and nut flush draw, seems fairly straight forward. Is that the right bet? One caller, don't know anything about him.

----- TURN ----- []
Astaroth: bets US$5
Mortedo: calls US$5

Marginal improvement, but $5 into a $9 pot. I was worried he might have been playing 45 for a double gut shot, or maybe trip 3s or 7s, and figured if he'll call $5 he'll probably call $9, and if he raised me i'd rather pay the smaller amount. He called pretty quickly, so i could only think he had some sort of draw.

----- RIVER ----- []
Astaroth: checks
Mortedo: checks
----- SHOW DOWN -----
Astaroth: shows [Jh 3c 6h Ah] (A Flush, Ace high)
Mortedo: mucks hand [7c 6c 8d Qd]
Astaroth collects US$18.05 from Main pot
----- SUMMARY -----
Total pot US$19 Main pot US$18.05 Rake US$0.95
Board [ ]
Seat 5: Astaroth (big blind) showed [ ] and won (US$18.05) with A Flush, Ace high
Seat 7: Mortedo mucked [ ]

Was the check on the river a spaz move? The only thing I could think he would be chasing with was a flush or str8 draw, the made both possible, so i thought he might bet his hand or bluff at me if I checked the river. Turns out he had two small pair, so probably wouldn't of called much of a bet anyway.

Gotta bet the river, if you think he might try to bluff or raise a lesser flush than bet like $2-3. otherwise I'm betting $10ish into that pot

You might want to try a check-raise on the flop if the table rarely lets a flop go by unbet. you don't really want a call and if someone wants to put there stack in you have lots of outs. But you'll win about the same with a check-raise as you did going to showdown if you get a bet and a call.