Nice write-up of Oakwell on Southend Fans website..

Our Impressions
Oakwell has undergone substantial redevelopment in the last 5-6 years with three new stands and only the old main stand remaining. The capacity is currently 23,000 with between 1,000 and 6,000 seats for away supporters, depending on the following of the visiting team. Away supporters are usually accommodated in the new North stand (...doesn't this make a change, away fans in a new stand!). This stand offers excellent unrestricted views, good facilities, and is ideally placed for the Queens Road car park (...see area details).

The remaining stands (...South & East) are both very impressive, and would not look out of place in the premiership. The club superstore is located within the 'van damme' stand, which is opposite the North stand (...where the away fans are located). This superstore looks very impressive, and was very popular on the day we visited.

...And Finally
It is recommended that you get to the ground at least 30 mins before kick off to see 'Toby Tyke' the undisputed king of the mascots