Valuebet this river or take the free showdown

[freechus9]

I'm pretty sure one of these guys has the A, but after it becomes isolated, villain displays a lot of weakness.. Should I have valuebet this river or just check it to showdown..

Hand #11009533-17748 at Redmond (No Limit Hold'em)
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Started at 30/Jan/06 23:08:46

mcolby69 is at seat 0 with $2.25.
skyjtc is at seat 1 with $4.
250K is at seat 2 with $9.95.
Grimmo is at seat 4 with $8.20.
moulton224 is at seat 6 with $4.60.
kenny57 is at seat 7 with $17.56.
tsid is at seat 8 with $1.63.
freechus is at seat 9 with $11.25.
The button is at seat 1.

250K posts the small blind of $.05.
Grimmo posts the big blind of $.10.

mcolby69: -- --
skyjtc: -- --
250K: -- --
Grimmo: -- --
moulton224: -- --
kenny57: -- --
tsid: -- --
freechus: Kc Tc

Pre-flop:

moulton224 folds. kenny57 folds. tsid folds.
freechus calls. mcolby69 calls. skyjtc folds.
250K calls. Grimmo checks.

Flop (board: Td Ac Ah):

250K checks. Grimmo bets $.40. freechus raises to
$2. mcolby69 calls. 250K folds. Grimmo calls.

Turn (board: Td Ac Ah 4s):

Grimmo checks. freechus checks. mcolby69 goes
all-in for $.15. Grimmo calls. freechus calls.

River (board: Td Ac Ah 4s Kh):

Grimmo checks. freechus

[DaHorror]

Well...mccolby has the Ace - so you might as well get a little value out of the other guy who doesn't - likely he has some other pair, or just the T with a worse kicker than you.

Interesting play though. At the dime tables I'm out of this hand on the flop. Maybe I'm missing some value :P