Every projection has South Carolina and Clemson hosting. In my opinion, they are both safe. USC has bad losses, but they beat LSU 2/3 on the road and swept UK. Arkansas, South Carolina, and Arizona State are all very similar... really good wins and really bad losses. We are more on the USA/KSU level... nothing fancy but nothing terrible. I think winning a big series says more than losing bad one. That, however, is merely a personal opinion... but the national analysts seems to agree.
If you compile the projections, the following 14 teams are safely IN right now (all major projections have the same 8 teams as nat'l seeds):
Vandy
UNC
LSU
Virginia
Oregon State
Fullerton
Florida State
Oregon
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NC State
UCLA
Clemson
Indiana
South Carolina
Louisville
Unless one of those bottom teams falls flat on their face, I think those 14 are safe bets. That leaves two spots left. Baseball America, Perfect Game, and (for good measure) SEBaseball.com all have different combos of Arkansas, Arizona State, and Kansas State occupying the last two spots. It comes down to a series win over South Carolina vaulting us over TWO of those teams to host. I don't think the committee will give both Arkansas and Kansas State host spots (although Baseball America disagrees). If Arkansas and KSU split a regional, that leaves the last spot to either us, Arizona State, or the darling wildcard... South Alabama.