Based on the Marvel Previews #64, December for February 2009, I'd say you need to pre-order the following books in order to keep up with Spider-Man.
Core Titles
Amazing Spider-Girl #29
Amazing Spider-Man #585
Amazing Spider-Man #586
Amazing Spider-Man #587
Amazing Spider-Man Family #4
Marvel Adventures Avengers #33
Marvel Adventures Spider-Man #48
New Avengers #50
Spider-Man: Noir #3, Patrick Zircher cover
Spider-Man: Noir #3, Dennis Calero variant cover
Ultimate Spider-Man #131
X-Men / Spider-Man #4
Guest Apps
Marvels: Eye Of The Camera #4
Marvels: Eye Of The Camera #4, B&W variant
New Exiles #12
Official Index To The Marvel Universe #2
Reprints
Essential Classic X-Men Vol. 3 TPB
Marvel Adventures Two-In-One #20
Marvel Europe TPB
Spider-Man: Brand New Day #5
Spider-Man: Brand New Day Vol. 3 TPB
Spider-Man: Crime And Punisher Premiere HC
Ultimate Spider-Man Vol. 10 HC
Wolverine Omnibus Vol. 1 HC
Wolverine Omnibus Vol. 1 HC, direct market variant (McNiven cover)