Well, he's in luck, because Ogres are blessed with a book that has a lot of strong choices, and just about all the stuff that has cannons in it make the list. I'd suggest getting two Ironblasters (cannons on chariots!), as well as two 6-man squads of Leadbelchers (Ogres with cannons!), and then filling the rest out with Ironguts and characters. To put my proverbial money where my mouth is, here's a list I'd advocate:
Starter List - 2250 pointsCore - 575 points:2 x 10 Gnoblars, Trappers
10 Ironguts, Full Command, Standard of Discipline
[BSB and Slaughtermaster go here]Special - 579 points:2 x 6 Leadbelchers
3 x Sabretusk
Rare - 340 points:2 x Ironblaster
Heroes - 336 points:Bruiser, BSB, Armor of Destiny, Ironfist
Butcher, Additional Hand Weapon, Hellheart, L2 Wizard
[Lore of the Great Maw]Lords - 385 points:Slaughtermaster, Dispel Scroll, Fencer's Blades, Greedy Fist, L4 Wizard
[Lore of Heavens]Grand Total: 2250 pointsThe strategy behind this list is fairly simple - you have a big block of Ironguts running up the middle to smash some face, while the cannons stay behind and shoot everything to soften tough targets up, while the Butcher runs close to enemy Wizards to try and blow them up, the Sabretusks run interference, and the Gnoblars stick in front of the Leadbelchers to dissuade people from charging them. I'm a big fan of Heavens' augments for this sort of list, but Lore of Death can work just as well (maybe even better, given the synergy with the Greedy Fist). Either way, this isn't meant to be followed as gospel as much as it is a starting point so that you know what models you need to buy (fortunately, Ogres aren't that expensive an army). Good luck!

"The best defense is a good offense." -General George S. Patton
"Everything in europe is comped badly. ETC is just 7th edition in disguise." -Shimmergloom from Da Warpath, on comp
My philosophy on gaming, courtesy of Herm Edwards.