Blackburn just tone towards the bottom of the scale, and is currently on 14th place and is very close to those places which are going to fell out of the league. If they dont win this match is very questionable leading of manager Sam Allardycea. Against Fulham, which is currently on 9th place, he will difficult have an excuse for defeat. Therefore he will try to solve his status in the club by any means, or he will have to leave. He can't count on sanctioned El-Hadji Diouf and injured midfielder Vincea Grella and attacker Jason Roberts, all the others are healthy and ready to play.
In Fulham there will be missing excellent striker Bobby Zamora, so manager Roy Hodgson will have to slightly change the first line-up and also the gameplay, which will likely be much more close than usual on Ewood Park stadium.
Victory of the hosts would calm down the situation in the club and would pursue a more peaceful competition. So my bet is on locals and on Under.

Last 6 matches Blackburn Rovers:

14/01-10 Carling Cup: Blackburn vs. Aston Villa 0:1
11/01-10 Premier league: Manchester City vs. Blackburn 4:1
02/01-10 FA Cup: Aston Villa vs. Blackburn 3:1
28/12-09 Premier league: Blackburn vs. Sunderland 2:2
26/12-09 Premier league: Wigan vs. Blackburn 1:1
19/12-09 Premier league: Blackburn vs. Tottenham 0:2

Last 6 matches Fulham:

05/01-10 Premier league: Stoke City vs. Fulham 3:2
02/01-10 FA Cup: Fulham vs. Swindon 1:0
28/12-09 Premier league: Chelsea vs. Fulham 2:1
26/12-09 Premier league: Fulham vs. Tottenham 0:0
19/12-09 Premier league: Fulham vs. Manchester Utd 3:0
16/12-09 UEFA League Europe, Group E: FC Basel vs. Fulham 2:3

Over/under goal statistics:

Blackburn Rovers season 2009/2010:
Over 2.5 Goals: 12 (57%)
Under 2.5 Goals: 9 (43%)

Fulham season 2009/2010:
Over 2.5 Goals: 9 (45%)
Under 2.5 Goals: 11 (55%)

History:
25/11-09 Premier league: Fulham vs. Blackburn 3:0
11/03-09 Premier league: Fulham vs. Blackburn 1:2
20/09-08 Premier league: Blackburn vs. Fulham 1:0
08/03-08 Premier league: Blackburn vs. Fulham 1:1
25/11-07 Premier league: Fulham vs. Blackburn 2:2
21/04-07 Premier league: Fulham vs. Blackburn 1:1
02/12-06 Premier league: Blackburn vs. Fulham 2:0
17/12-05 Premier league: Fulham vs. Blackburn 2:1
20/08-05 Premier league: Blackburn vs. Fulham 2:1
07/05-05 Premier league: Blackburn vs. Fulham 1:3
27/11-04 Premier league: Fulham vs. Blackburn 0:2
12/04-04 Premier league: Fulham vs. Blackburn 3:4
28/09-03 Premier league: Blackburn vs. Fulham 0:2
07/04-03 Premier league: Fulham vs. Blackburn 0:4
30/11-02 Premier league: Blackburn vs. Fulham 2:1
11/05-02 Premier league: Blackburn vs. Fulham 3:0
09/02-02 Premier league: Fulham vs. Blackburn 2:0
11/04-01 Championship League: Blackburn vs. Fulham 1:2
15/10-00 Championship League: Fulham vs. Blackburn 2:1

My tip is 1
Highest odd is on bet365 2,40

and

Under 2,5
Highest odd is on expekt 1,68